Suppose that you are required to write an application to model interns and supervisors in a company.

1- Define an abstract superclass called Staff to store two properties as:

String name;

String address;

[4 points] Provide (only one) constructor which sets the name and address properties.

[6 points] Provide getters & setters and toString() methods for the class Staff.

2- Define:

[2 points] Two subclasses of Staff, one named Intern and one Supervisor.

[3 points] Both classes, Intern and Supervisor must implement the interface StaffInfo, provided below.

3- Requirements for the class Intern:

should maintain a list of tasks taken and the respective hours for each task.

an intern cannot have more than 10 tasks

should also provide a method to add a task with hours

print all tasks taken with task description and hours

calculate the average hours of the tasks assigned

[5 points] Intern() constructor calling the parent constructor

[5 points] private instance variables: numTasks, taskList[], hourList[], MaxNumTasks=10

[5 points] toString() method to describe itself. Add the string Intern: to the beginning.

[5 points] addTaskHours(task, hours) adds a task and its hours. Validate that task description is not null and hours are greater than zero

[5 points] // printHours() prints all Tasks taken and their hour

[5 points] // getAverageHour() computes the average hour

4- Requirements for the class Supervisor:

should maintain a list of tasks they currently supervise

be able to add or remove a task supervised

assume that a supervisor cannot supervise more than 5 tasks

[5 points] private instance variables: numTasks, taskList[], MaxNumTasks=5

[5 points] Supervisor () constructor calling the parent constructor

[5 points] toString() method to describe itself. Add the string Superviser: to the beginning.

[5 points] addTask(task) adds a task to task list. Returns false if task already in the list.

[5 points] removeTask (task) removes a task from task list. Returns false if task not found.

Note: Your program solution may only be uploaded in .jar format. No other format will be graded.

Interface to be implemented by the Intern & the Supervisor class as described in item 2 above.

/**************************************************

* StaffInfo interface declaration.

**************************************************/

public interface StaffInfo {

// Returns (String Supervisor or Intern), name + address of the staff

String getStaffInfo();

}