diff --git a/Graduate.java b/Graduate.java
new file mode 100644
index 0000000..8e8f1fa
--- /dev/null
+++ b/Graduate.java
@@ -0,0 +1,18 @@
+
+public class Graduate extends Student{
+	private String advisor;
+	
+	public Graduate(String name, String major, String advisor) {
+		super(name, major);
+		setAdvisor(advisor);
+	}
+	public void setAdvisor(String advisor) {
+		this.advisor = advisor;
+	}
+	public String getAdvisor() {
+		return advisor;
+	}
+	public int tuition() {
+		return 1500*getCredits();
+	}
+}
diff --git a/Registration.java b/Registration.java
new file mode 100644
index 0000000..e917610
--- /dev/null
+++ b/Registration.java
@@ -0,0 +1,13 @@
+
+public class Registration {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		UnderGraduate u1 = new UnderGraduate("Mary", "MIS");
+		u1.addCredits(21);
+		u1.addCredits(15);
+		u1.setHonor(true);
+		System.out.println(u1.tuition());
+	}
+
+}
diff --git a/Student.java b/Student.java
new file mode 100644
index 0000000..83b06df
--- /dev/null
+++ b/Student.java
@@ -0,0 +1,29 @@
+
+public class Student {
+	private String name;
+	private String major;
+	protected int credits = 0;
+	
+	public Student(String name, String major) {
+		setName(name);
+		setMajor(major);
+	}
+	public void setName(String name) {
+		this.name = name;
+	}
+	public String getName() {
+		return name;
+	}
+	public void setMajor(String major) {
+		this.major = major;
+	}
+	public String getMajor() {
+		return major;
+	}
+	public int getCredits() {
+		return credits;
+	}
+	public void addCredits(int credits) {
+		this.credits += credits;
+	}
+}
diff --git a/UnderGraduate.java b/UnderGraduate.java
new file mode 100644
index 0000000..8ffe939
--- /dev/null
+++ b/UnderGraduate.java
@@ -0,0 +1,14 @@
+
+public class UnderGraduate extends Student{
+	private boolean honor = false;
+	
+	public UnderGraduate(String name, String major) {
+		super(name, major);
+	}
+	public void setHonor(boolean honor) {
+		this.honor = honor;
+	}
+	public int tuition() {
+		return (honor == true)?500*getCredits():1000*getCredits();
+	}
+}