diff --git a/6B_Group4.py b/6B_Group4.py
new file mode 100644
index 0000000..5d076d3
--- /dev/null
+++ b/6B_Group4.py
@@ -0,0 +1,233 @@
+"""
+Yasin Bey,
+        1 - Görev Ekleme fonksiyonu
+            Fonksiyon adı: add_task
+            Parametreler: tasks (list), tasks_file (str)
+                tasks : Task listesi
+                    task = {
+                        "id": task_id,
+                        "name": task_name,
+                        "status": "Pending", "Completed", "Deleted"
+                    }
+                tasks_file : Task listesinin kaydedileceği dosya adı
+            İşlev: Yeni bir görev ekler.
+            İşlem:
+                - Yeni bir görev oluşturulur ve tasks listesine eklenir.
+                - Görev name kullanıcı tarafından girilir.
+                - Yeni görevin id'si otomatik olarak atanır ve tasks listesindeki en büyük id'den bir fazla olacak şekilde oluşturulur.
+                - Yeni görevin status'u "Pending" olarak ayarlanır.
+                - task tasks listesine eklenir.
+                - tasks dosyaya kaydedilir. save_file fonksiyonu kullanılır. save_file(tasks_file, tasks) şeklinde kullanılır.
+                - Kullanıcıya görevin eklenmesi başarılı olduğu bilgisi verilir.
+            Dönüş Değeri: Boolean (True)or False kayıt başarılı ise True başarısız ise False döner.
+        2 - Görev Tamamlama fonksiyonu
+            Fonksiyon adı: complete_task
+            Parametreler: tasks (list), task_id (int), tasks_file (str)
+                tasks : Task listesi
+                task_id : Tamamlanacak görevin id'si
+                tasks_file : Task listesinin kaydedileceği dosya adı
+            işlev: Bir görevin tamamlanmasını sağlar.
+            İşlem:
+                - task_id ile tasks listesinde arama yapılır.
+                - Eğer task_id ile eşleşen bir görev bulunamazsa, "Task not found" mesajı gösterilir ve fonksiyon sonlanır.
+                - Eğer task_id ile eşleşen bir görev bulunursa, görevin status'u "Completed" olarak güncellenir.
+                - tasks dosyaya kaydedilir. save_file fonksiyonu kullanılır. save_file(tasks_file, tasks) şeklinde kullanılır.
+                - Kullanıcıya görevin tamamlanması başarılı olduğu bilgisi verilir.
+            Dönüş Değeri: Boolean (True)or False kayıt başarılı ise True başarısız ise False döner.
+    Kahraman Bey,
+        3 - Görev Silme fonksiyonu
+            Fonksiyon adı: delete_task
+            Parametreler: tasks (list), task_id (int), tasks_file (str)
+                tasks : Task Listesi
+                task_id : Silinecek görevin id'si
+                tasks_file : Task listesinin kaydedileceği dosya adı
+            İşlev: Bir görevin statusun deleted olarak güncellenmesini sağlar.
+            İşlem:
+                - task_id ile tasks listesinde arama yapılır.
+                - Eğer task_id ile eşleşen bir görev bulunamazsa, "Task not found" mesajı gösterilir ve fonksiyon sonlanır.
+                - Eğer task_id ile eşleşen bir görev bulunursa, görevin status'u "Deleted" olarak güncellenir.
+                - task_id değerine None atanır.
+                - task_id si silinen task_id den büyük olan görevlerin id'leri bir azaltılır.
+                - tasks dosyaya kaydedilir. save_file fonksiyonu kullanılır. save_file(tasks_file, tasks) şeklinde kullanılır.
+                - Kullanıcıya görevin silinmesi başarılı olduğu bilgisi verilir.
+            Dönüş Değeri: Boolean (True)or False kayıt başarılı ise True başarısız ise False döner.
+    Neslihan Hanım,
+        4 - Listeleme fonksiyonu
+            Fonksiyon adı: list_tasks
+            Parametreler: tasks (list), status (list)
+                tasks : Task listesi
+                status : Görevlerin listelenmek istenen durumu  örneğin status = ["Pending", "Completed"]
+            İşlev: Görevleri listeler ve bir grid formatında görüntüler.
+            İşlem:
+                - tasks listesi içerisinde status değeri status parametresinin içinde olan görevler filtrelenir.
+                - Filitrelenen görevler grid formatında görüntülenir.
+                - Görevlerin id, name ve status bilgileri görüntülenir.
+            Döüş Değeri: Listelediği görevlerin sayısını döner.
+    Mustafa Gundoğdu:
+        Ana program menüsü ile kullanıcıdan alınan seçeneklere göre fonksiyonları çağıran ve gerekli işlemleri yapan bir ana program yazınız.
+
+"""
+
+import json,os
+def save_file(file_path, data):
+    try:
+        with open(file_path, 'w', encoding='utf-8') as file:
+            json.dump(data, file, ensure_ascii=False, indent=4)
+        # print(f"Data was successfully written to file: {file_path}")
+    except Exception as e:
+        print(f"Error: Data could not be written to file. Details: {e}")
+def load_file(file_path):   
+    """
+    Reads a list from a file in JSON format.
+    """
+    if not os.path.exists(file_path):
+        save_file(file_path, [])
+        return []
+    try:
+        with open(file_path, 'r', encoding='utf-8') as file:
+            return json.load(file)
+    except json.JSONDecodeError:
+        print("Error: JSON format is invalid.")
+        return []
+    except Exception as e:
+        print(f"Error: File could not be read. Details: {e}")
+        return []
+#Yasin Sinan Code Block
+def add_task(tasks, tasks_file):
+    task_name = input("Enter the task name: ")
+    task_id = 1
+
+    for i in tasks:
+        if i["id"] : 
+            task_id = i["id"] + 1
+
+    tasks.append({"id": task_id, "name": task_name, "status": "Pending"})
+
+    save_file(tasks_file, tasks)
+
+    print("Newstask added successfully")
+    return True
+
+
+def complete_task(tasks, task_id, tasks_file):
+    for i in tasks:
+        if i["id"] == task_id:
+            i["status"] = "completed"
+
+            save_file(tasks_file, tasks)
+
+            print("Task status is changed")
+            return True
+
+    print("Task is not found")
+    return False
+
+#Kahraman Dal Code Block
+
+def delete_task(tasks, task_id, tasks_file):
+    
+    task_found = False
+    for task in tasks:
+        if task.get("id") == task_id:
+            task_found = True
+            task["status"] = "Deleted"
+            task["id"] = None
+            break
+
+    if not task_found:
+        print("Task not found")
+        return False
+
+
+    for task in tasks:
+        if task["id"] != None and task["id"] > task_id:
+            task["id"] -= 1
+
+    save_file(tasks_file, tasks)
+
+    print(f"Task with ID {task_id} has been successfully deleted.")
+    return True
+
+#Neslihan Code Block
+# List Tasks
+def list_tasks(tasks, status=["Pending", "Completed"]):
+    """
+    Lists all tasks with their status in a grid format.
+    """
+    filtered_tasks = [task for task in tasks if task["status"] in status]
+    
+    #1 Print grid header
+    print(f"\n{'ID':<10}{'Name':<60}{'Status':<15}")
+   
+    print("-" * 85)
+    #* 50: Tire karakterini 50 defa tekrarlayarak bir çizgi oluşturur.
+    
+    for task in filtered_tasks:
+        print(f"{str(task['id']):<10}{task['name']:<60}{task['status']:<15}")
+
+#print_grid(None, filtered_tasks)
+    task_count = len(filtered_tasks)
+    print(f"\n Total tasks listed: {task_count}")
+
+    return task_count
+
+
+
+# Mustafa Gundogdu Code Block
+if __name__ == "__main__":
+    tasks_file = "tasks.json"   
+    tasks = load_file(tasks_file)
+    incorrectly_entered = False
+    exit_confirmation = True
+    main_menu = ["╔════════════════════════════════════════════════════════════╗ ",
+                "║                  WELCOME TO TASK MANAGER                   ║ ",
+                "╠════════════════════════════════════════════════════════════╣ ",
+                "║                                                            ║ ",
+                "║               (1) Add a new task                           ║ ",
+                "║               (2) Complete a task                          ║ ",
+                "║               (3) Delete a task                            ║ ",
+                "║               (4) List commpleted tasks                    ║ ",
+                "║               (5) List all tasks with their status         ║ ",
+                "║                                                            ║ ",
+                "╠════════════════════════════════════════════════════════════╣ ",
+                "║                     (Q) Quit / Exit                        ║ ",
+                "╚════════════════════════════════════════════════════════════╝ "
+                ]
+    while exit_confirmation:
+        os.system("cls" if os.name == "nt" else "clear")
+        if tasks :
+            list_tasks(tasks,["Pending"])   
+        for i in main_menu:
+            print(i)
+        if incorrectly_entered:
+            print("Incorrect choice. Please try again.")
+            incorrectly_entered = False
+        
+        choice = input("Enter your choice: ")
+        if choice in ["q", "Q", "exit", "EXIT", "6"]:
+            exit_confirmation = False
+        elif choice == "1":
+            if not add_task(tasks, tasks_file):
+                print("Error: Task could not be added.")
+            input("Press Enter to continue...")
+        elif choice == "2":
+            task_id = int(input("Enter the task id: "))
+            if not complete_task(tasks, task_id, tasks_file):
+                print("Error: Task could not be completed.")
+            input("Press Enter to continue...")
+        elif choice == "3":
+            task_id = int(input("Enter the task id: "))
+            if not delete_task(tasks, task_id, tasks_file):
+                print("Error: Task could not be deleted.")
+            input("Press Enter to continue...")
+        elif choice == "4":
+            tasks_count = list_tasks(tasks, ["Completed"])
+            input(f"{tasks_count} tasks completed. Press Enter to continue...")
+        elif choice == "5":
+            tasks_count = list_tasks(tasks,["Pending", "Completed", "Deleted"])
+            input(f"All missions total {tasks_count}. Press Enter to continue...")
+        else:
+            incorrectly_entered = True
+    else:
+        print("Thank you for using the Task Manager. Goodbye!")
+        input("Press Enter to exit...")
diff --git a/Week3.py b/Week3.py
new file mode 100644
index 0000000..b67d3b0
--- /dev/null
+++ b/Week3.py
@@ -0,0 +1,232 @@
+"""
+Question 1: Task Manager Application
+Project Description: In this assignment, you will create a task manager application using the Python programming language. This application will allow users to add, complete, delete, and list their tasks.
+
+Requirements:
+1- Tasks will be stored in a Python list and each task will be represented as a dictionary. Each task must have the following properties:
+
+Sequence Number (Automatically assigned)
+
+Task Name
+
+Status (Completed, Pending, or Deleted)
+
+2- Operations that the user can perform:
+
+Add a new task
+
+Complete a task
+
+Delete a task
+
+List completed tasks
+
+List all tasks with their status
+
+Exit
+
+3- Tasks should automatically receive a sequence number in the order they are added.
+
+4- New tasks should be saved in place of the numbers of deleted tasks.
+
+5- When listing tasks, they should be sorted by their sequence number.
+
+6- Appropriate feedback should be given to the user after each operation. For example, when a new task is added, they should see a message indicating that the task has been added.
+"""
+import os
+import json
+def create_grid(tasks, field_names, field_widths, grid_name):
+    """
+    Creates a grid of tasks.
+    """
+    start_first_row = "╔"
+    end_first_row = "╗"
+    start_middle_row = "╠"
+    end_middle_row = "╣"
+    start_last_row = "╚"
+    end_last_row = "╝"
+    separator_column = "║"
+    separator_row = "═"
+    separator_sub_row = "─"
+    separator_sub_column = "│"
+    grid = []
+    grid_first_row = start_first_row+separator_row*(sum(field_widths)+((len(field_widths)-1)*3))+end_first_row
+    grid.append(grid_first_row)
+    grid_middle_row = separator_column+grid_name.center(sum(field_widths)+((len(field_widths)-1)*3)," ")+separator_column
+    grid.append(grid_middle_row)
+    grid_middle_row = start_middle_row+separator_row*(sum(field_widths)+((len(field_widths)-1)*3))+end_middle_row
+    grid.append(grid_middle_row)
+    field_counter = 0
+    for field_name in field_names:
+        if field_counter == 0:
+            grid_middle_row = separator_column+field_name.center(field_widths[field_names.index(field_name)]," ")
+            if field_counter != len(field_widths)-1:
+                grid_middle_row += " "+separator_column+" "
+            else:
+                grid_middle_row += " "+separator_sub_column+" "
+        elif field_counter == len(field_widths)-1:
+            grid_middle_row += field_name.center(field_widths[field_counter]," ")+separator_column
+        else:
+            grid_middle_row += field_name.center(field_widths[field_names.index(field_name)]," ")+" "+separator_sub_column+" "
+        field_counter += 1
+    grid.append(grid_middle_row)
+    grid_middle_row = separator_column+separator_sub_row*(sum(field_widths)+((len(field_widths)-1)*3))+separator_column
+    grid.append(grid_middle_row)
+    for task in tasks:
+        field_counter = 0
+        for field_name in field_names:
+            if field_counter == 0:
+                grid_middle_row = separator_column + str(task["id"]).center(field_widths[field_counter]," ")
+                if field_counter == len(field_widths)-1:
+                    grid_middle_row += " "+separator_column+" "
+                else:
+                    grid_middle_row += " "+separator_sub_column+" "
+            elif field_counter == len(field_widths)-1:
+                grid_middle_row += task[field_name].center(field_widths[field_counter]," ")+separator_column
+            else:
+                grid_middle_row += task[field_name].center(field_widths[field_names.index(field_name)]," ")+" "+separator_sub_column+" "
+            field_counter += 1
+        grid.append(grid_middle_row)
+        if tasks.index(task) != len(tasks)-1:
+            grid_middle_row = separator_column+separator_sub_row*(sum(field_widths)+((len(field_widths)-1)*3))+separator_column
+            grid.append(grid_middle_row)
+    grid_last_row = start_last_row+separator_row*(sum(field_widths)+((len(field_widths)-1)*3))+end_last_row
+    grid.append(grid_last_row)
+    return grid
+
+def save_file(file_path, data):
+    try:
+        with open(file_path, 'w', encoding='utf-8') as file:
+            json.dump(data, file, ensure_ascii=False, indent=4)
+        # print(f"Data was successfully written to file: {file_path}")
+    except Exception as e:
+        print(f"Error: Data could not be written to file. Details: {e}")
+def load_file(file_path):   
+    """
+    Reads a list from a file in JSON format.
+    """
+    if not os.path.exists(file_path):
+        save_file(file_path, [])
+        return []
+    try:
+        with open(file_path, 'r', encoding='utf-8') as file:
+            return json.load(file)
+    except json.JSONDecodeError:
+        print("Error: JSON format is invalid.")
+        return []
+    except Exception as e:
+        print(f"Error: File could not be read. Details: {e}")
+        return []
+    
+def add_task(tasks, tasks_file):
+    """
+    Adds a new task to the task list.
+    """
+    task_id = max(task["id"] for task in tasks) + 1 if tasks else 1
+    task_name = input("Enter the task name: ")
+    task = {
+        "id": task_id,
+        "name": task_name,
+        "status": "Pending"
+    }
+    tasks.append(task)
+    save_file(tasks_file, tasks)
+    print(f"Task {task_name} added successfully.")
+    return True
+
+def complete_task(tasks, task_id, tasks_file):
+    """
+    Completes the task with the given id.
+    """
+    for task in tasks:
+        if task["id"] == task_id:
+            task["status"] = "Completed"
+            save_file(tasks_file, tasks)
+            print(f"Task {task["name"]} completed successfully.")
+            return True
+    return False
+
+def delete_task(tasks, task_id, tasks_file):
+    """
+    Deletes the task with the given id.
+    """
+    finding_task = False
+    for task in tasks:
+        if task["id"] != None:
+            if task["id"] == task_id:
+                task["id"] = None
+                task["status"] = "Deleted"
+                finding_task = True
+            elif task["id"] > task_id:
+                task["id"] -= 1
+    if finding_task:
+        save_file(tasks_file, tasks)
+    else:
+        print("Task not found.")
+    return finding_task
+
+def list_tasks(tasks, statatus = ["Pending"]):
+    """
+    Lists all tasks with their status.
+    """
+    listed_tasks = [task for task in tasks if task["status"] in statatus]
+    grid = create_grid(listed_tasks, ["id", "name", "status"], [5, 50, 12], "Tasks List")
+    for row in grid:
+        print(row)
+    return len(listed_tasks)
+        
+
+if __name__ == "__main__":
+    tasks_file = "tasks.json"
+    tasks = load_file(tasks_file)
+    incorrectly_entered = False
+    exit_confirmation = True
+    main_menu = ["╔════════════════════════════════════════════════════════════╗ ",
+                "║                  WELCOME TO TASK MANAGER                   ║ ",
+                "╠════════════════════════════════════════════════════════════╣ ",
+                "║                                                            ║ ",
+                "║               (1) Add a new task                           ║ ",
+                "║               (2) Complete a task                          ║ ",
+                "║               (3) Delete a task                            ║ ",
+                "║               (4) List commpleted tasks                    ║ ",
+                "║               (5) List all tasks with their status         ║ ",
+                "║                                                            ║ ",
+                "╠════════════════════════════════════════════════════════════╣ ",
+                "║                     (Q) Quit / Exit                        ║ ",
+                "╚════════════════════════════════════════════════════════════╝ "
+                ]
+    while exit_confirmation:
+        os.system("cls" if os.name == "nt" else "clear")
+        if tasks :
+            list_tasks(tasks)   
+        for i in main_menu:
+            print(i)
+        if incorrectly_entered:
+            print("Incorrect choice. Please try again.")
+            incorrectly_entered = False
+        
+        choice = input("Enter your choice: ")
+        if choice in ["q", "Q", "exit", "EXIT", "6"]:
+            exit_confirmation = False
+        elif choice == "1":
+            if not add_task(tasks, tasks_file):
+                print("Error: Task could not be added.")
+            input("Press Enter to continue...")
+        elif choice == "2":
+            task_id = int(input("Enter the task id: "))
+            if not complete_task(tasks, task_id, tasks_file):
+                print("Error: Task could not be completed.")
+            input("Press Enter to continue...")
+        elif choice == "3":
+            task_id = int(input("Enter the task id: "))
+            if not delete_task(tasks, task_id, tasks_file):
+                print("Error: Task could not be deleted.")
+            input("Press Enter to continue...")
+        elif choice == "4":
+            tasks_count = list_tasks(tasks, ["Completed"])
+            input(f"{tasks_count} tasks completed. Press Enter to continue...")
+        elif choice == "5":
+            tasks_count = list_tasks(tasks,["Pending", "Completed", "Deleted"])
+            input(f"All missions total {tasks_count}. Press Enter to continue...")
+        else:
+            incorrectly_entered = True
\ No newline at end of file
diff --git a/hackerrank.py b/hackerrank.py
new file mode 100644
index 0000000..c98d8ef
--- /dev/null
+++ b/hackerrank.py
@@ -0,0 +1,27 @@
+# # https://www.hackerrank.com/challenges/find-digits/problem
+
+def findDigits(n):
+    # Write your code here
+    str_n = str(n)
+    dividers = 0
+    for i in str_n:
+        if i != "0" and n % int(i) == 0:
+            dividers +=1
+    return dividers
+
+"""---------------------------------------------"""
+# # https://www.hackerrank.com/challenges/capitalize/problem
+def solve(s):
+    return_s = ""
+    uppercase_ = True
+    for i in s:
+        if (i != " ") and not i.isnumeric() and uppercase_ :
+            return_s += i.upper()
+            uppercase_ = False
+        elif i == " ":
+            return_s += i
+            uppercase_ = True
+        else:
+            return_s += i
+            uppercase_ = False
+    return return_s
\ No newline at end of file