first commit

src/Employee.java

+import java.util.ArrayList;
+
+public class Employee extends Person {
+    protected ArrayList<Statement> bankStatement;
+    protected String position;
+    protected double basicIncome;
+    public Employee(String firstName, String lastName, String ID, int joiningYear, Department department,String position,double basicIncome) {
+        super(firstName, lastName, ID, joiningYear, department);
+        this.position=position;
+        bankStatement=new ArrayList<Statement>();
+        this.basicIncome=basicIncome;
+    }
+
+    public ArrayList<Statement> getBankStatement() {
+        return bankStatement;
+    }
+
+    public void addBankstatement(Statement statement){
+        bankStatement.add(statement);
+    }
+
+    public String getPosition() {
+        return position;
+    }
+    public  void setBasicIncome(double income){
+    basicIncome=income;
+    }
+
+}

src/GradStudent.java

+public class GradStudent {
+
+}

src/Student.java

+import java.util.ArrayList;
+
+public class Student extends Person {
+    ArrayList<Course>courses;
+    public Student(String firstName, String lastName, String ID, int joiningYear, Department department) {
+        super(firstName, lastName, ID, joiningYear, department);
+      courses=new ArrayList<>();
+    }
+
+    public ArrayList<Course> getCourses() {
+        return courses;
+    }
+    public void addCourse(Course c){
+        courses.add(c);
+    }
+}

src/UnderGradStudent.java

+public class UnderGradStudent extends Student {
+    public UnderGradStudent(String firstName, String lastName, String ID, int joiningYear, Department department) {
+        super(firstName, lastName, ID, joiningYear, department);
+    }
+
+}