Consider a class PersonAddress that represents an entry in an address boolc Its attributes are
0 The first name of the person

0 The last name of the person

0 The e-mail address of the person

0 The telephone number of the person

It will have methods to

0 Access each attribute

- Change the e-mail address

0 Change the telephone number

0 Test whether two instances are equal based solely on name
a. Write a method heading for each method.

b. Write preconditions and postconditions for each method.
c. Write some Java statements that test the class.