(Java problem)

Consider a class StaffMember that represents all workers in a certain organization, some of whom are managers, some are engineers and some are administrative assistant. Each staff member has a name, ID, recruitment year and each member get paid monthly based on his type.

Managers: Basic salary + (Basic salary Serving years 0.01) Engineers: Basic salary + (Basic salary Serving years 0.02) Administrative Assistant: Working hours Hourly wage.

You are required to:

A. Implement StaffMember class and all of its subclasses.

B. Implement StaffMembersTest.java class that allows the user to choose from

the following menu options:

1. Add a new staff member.

2. Remove a staff member.

3. Display all staff members in the organization with complete

information.

4. Exit. Note: application will continue until the user chooses 4.

C. In StaffMembersTest.java, you are required to implement the following static methods:

1. displayMenu method that prints the menu and returns the user choice. 2. printMembers method that prints all members info.

3. addMember, that allows the user to add a new member based on the member type.

4. removeMember, that removes a member based on his ID.