1. Design and declaration. All classes data fields should be private. (40%)

a. Design a class named Person (5%)

i. Person has a data field: name. Default: name is unknown,

ii. Person has a method printInfo() which will print all data fields.

iii. and its two subclasses named Student and Employee.

b. Design a class named Employee which is a subclass of Person. (5%)

i. Employee has a data field: salary. Default: salary is 0,

ii. Employee has a method printInfo()which will print all data fields( including data fields in super class) (Hint: use super keyword to get info from super class.)

c. Design a class named Faculty which is a subclass of Employee. (10%)

i. Faculty has a data field: dept. Default: dept is none,

ii. Faculty has a method printInfo()which will print all data fields( including data fields in super class)

d. Design a class named Student which is a subclass of Person. (10%)

i. Student has two data fields: age, default 0; email address, default: none

ii. Student has a method printInfo()which will print all data fields( including data fields in super class)

e. Implement necessary constructors, accessor and mutator methods for all the above classes.(10%)

2. Write a test program to create two Students and two Faculties, assign (NOT read from console) the following information, and invokes their printInfo methods. xxxx is your school ID. (10%)

A Student object name: unknown, age: -1, email: none

A Student object name: demo_s2, age: 23, email: xyz @ email

A Faculty object name: demo_f1, salary: -1, dept: none

A Faculty object name: demo_f2, salary: 10000, dept: CS

3. Your program output should look like below: (10%)

Student name: unknown, age: -1, Email: none

Student name: demo_s2, age: 23, Email: xyz@certain email

Faculty name: demo_f1, salary: -1, dept: none

Faculty name: demo_f2, salary: 10000, dept: CS

This should be coded in ONE java file.