diff --git a/app/build.gradle b/app/build.gradle
index 07e82a52..e6ecf6e1 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -5,7 +5,7 @@ plugins {
 }
 
 android {
-    compileSdk 34
+    compileSdk 36
 
     defaultConfig {
         applicationId "otus.gpb.homework.activities"
@@ -56,4 +56,6 @@ dependencies {
     implementation 'androidx.core:core-ktx:1.13.1'
     implementation 'androidx.appcompat:appcompat:1.6.1'
     implementation 'com.google.android.material:material:1.12.0'
+    implementation 'androidx.activity:activity:1.11.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.2.1'
 }
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 811aafa1..6a95637a 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -11,6 +11,33 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Activities"
-        tools:targetApi="31" />
+        tools:targetApi="31">
+        <activity
+            android:name=".ActivityD"
+            android:exported="false"
+            android:launchMode="singleInstance"/>
+        <activity
+            android:name=".ActivityC"
+            android:exported="false"
+
+            android:launchMode="singleInstance"/>
+        <activity
+            android:name=".ActivityB"
+            android:exported="false"
+            android:taskAffinity="abcd.abcd"
+            />
+        <activity
+            android:name=".ActivityA"
+            android:exported="true"
+
+            android:launchMode="singleTask"
+            android:configChanges="orientation|screenSize|keyboardHidden">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/activities/ActivityA.kt b/app/src/main/java/otus/gpb/homework/activities/ActivityA.kt
new file mode 100644
index 00000000..7effe2bf
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/activities/ActivityA.kt
@@ -0,0 +1,35 @@
+package otus.gpb.homework.activities
+
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Button
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+import otus.gpb.homework.activities.R.id.buttonBBBB
+
+class ActivityA : AppCompatActivity() {
+    private lateinit var  activityBBBtn: Button
+
+
+    @SuppressLint("MissingInflatedId")
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_a)
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
+            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
+            insets
+        }
+
+        activityBBBtn = findViewById(buttonBBBB)
+        activityBBBtn.setOnClickListener {
+            val intent = Intent(this, ActivityB::class.java)
+            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            startActivity(intent)
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/activities/ActivityB.kt b/app/src/main/java/otus/gpb/homework/activities/ActivityB.kt
new file mode 100644
index 00000000..074c5642
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/activities/ActivityB.kt
@@ -0,0 +1,34 @@
+package otus.gpb.homework.activities
+
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Button
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+import otus.gpb.homework.activities.R.id.buttonBBBB
+
+class ActivityB : AppCompatActivity() {
+    private lateinit var activityCBtn: Button
+
+
+    @SuppressLint("MissingInflatedId")
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_b)
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
+            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
+            insets
+        }
+
+        activityCBtn = findViewById(R.id.btnB)
+        activityCBtn.setOnClickListener {
+            val intent = Intent(this, ActivityC::class.java)
+            startActivity(intent)
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/activities/ActivityC.kt b/app/src/main/java/otus/gpb/homework/activities/ActivityC.kt
new file mode 100644
index 00000000..a80f1f78
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/activities/ActivityC.kt
@@ -0,0 +1,54 @@
+package otus.gpb.homework.activities
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import android.util.AttributeSet
+import android.view.View
+import android.widget.Button
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class ActivityC : AppCompatActivity() {
+    private lateinit var activityABtn: Button
+    private lateinit var closeActivityCBtn: Button
+    private lateinit var activityDBtn: Button
+    private lateinit var activityStackBackBtn: Button
+
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_c)
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
+            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
+            insets
+        }
+
+        activityABtn = findViewById(R.id.buttonA)
+        closeActivityCBtn = findViewById(R.id.buttonC)
+        activityDBtn = findViewById(R.id.buttonD)
+        activityStackBackBtn = findViewById(R.id.buttonBackStack)
+
+        activityABtn.setOnClickListener {
+            val intent = Intent(this, ActivityA::class.java)
+            startActivity(intent)
+        }
+        closeActivityCBtn.setOnClickListener {
+            finish()
+        }
+
+        activityDBtn.setOnClickListener {
+            val intent = Intent(this, ActivityD::class.java)
+            startActivity(intent) }
+
+        activityStackBackBtn.setOnClickListener {
+            finishAndRemoveTask()
+        }
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/activities/ActivityD.kt b/app/src/main/java/otus/gpb/homework/activities/ActivityD.kt
new file mode 100644
index 00000000..1c403481
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/activities/ActivityD.kt
@@ -0,0 +1,20 @@
+package otus.gpb.homework.activities
+
+import android.os.Bundle
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class ActivityD : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_d)
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
+            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
+            insets
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_a.xml b/app/src/main/res/layout/activity_a.xml
new file mode 100644
index 00000000..63afd321
--- /dev/null
+++ b/app/src/main/res/layout/activity_a.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ActivityA"
+    android:background = "#f44336">
+
+    <Button
+        android:id="@+id/buttonBBBB"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Open ActivityB"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_b.xml b/app/src/main/res/layout/activity_b.xml
new file mode 100644
index 00000000..5bbdc79f
--- /dev/null
+++ b/app/src/main/res/layout/activity_b.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ActivityB"
+    android:background = "#4caf50">
+    <Button
+        android:id="@+id/btnB"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Open ActivityC"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_c.xml b/app/src/main/res/layout/activity_c.xml
new file mode 100644
index 00000000..6331ef86
--- /dev/null
+++ b/app/src/main/res/layout/activity_c.xml
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background = "#2196f3"
+    tools:context=".ActivityC">
+
+    <Button
+        android:id="@+id/buttonA"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:text="Open ActivityA"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toTopOf="@id/buttonD"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintVertical_chainStyle="packed" />
+
+    <Button
+        android:id="@+id/buttonD"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:text="Open ActivityD"
+        app:layout_constraintTop_toBottomOf="@id/buttonA"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <Button
+        android:id="@+id/buttonC"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:text="close activity C"
+        app:layout_constraintTop_toBottomOf="@id/buttonD"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <Button
+        android:id="@+id/buttonBackStack"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:text="Close Stack"
+        app:layout_constraintTop_toBottomOf="@id/buttonC"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/layout/activity_d.xml b/app/src/main/res/layout/activity_d.xml
new file mode 100644
index 00000000..001a6299
--- /dev/null
+++ b/app/src/main/res/layout/activity_d.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background = "#ffeb3b"
+    tools:context=".ActivityD">
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 8ec48d7a..22f1e0b2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,7 +2,7 @@
 plugins {
     id 'com.android.application' version '8.4.0' apply false
     id 'com.android.library' version '8.4.0' apply false
-    id 'org.jetbrains.kotlin.android' version '1.9.23' apply false
+    id 'org.jetbrains.kotlin.android' version '1.9.20' apply false
     id "io.gitlab.arturbosch.detekt" version "1.21.0"
 }