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Project 8-2: Person Manager
Create an application that lets you enter a new customer or a new employee.

Console
Welcome to the Person Manager

Create customer or employee? (c/e):

Error! This entry is required. Try again.

Create customer or employee? (c/e): p

Error! Entry must be ‘c’ or ‘e’. Try again.

Create customer or employee? (c/e): c

First name: Steve

Last name: Trevor

Customer number: M10293

You entered a new Customer:

Name: Steve Trevor

Customer Number: M10293

Continue? (y/n): y

Create customer or employee? (c/e): e

First name: Diana

Last name: Prince

SSN: 111-22-3333

You entered a new Employee:

Name: Diana Prince

SSN: xxx-xx-3333

Continue? (y/n): OK

Error! Entry must be ‘y’ or ‘n’. Try again.

Continue? (y/n): n

Specifications
Create a class named Person with these constructors and methods:

public Person(String first, String last)

public String getFirstName()

public void setFirstName(String first)

public String getLastName()

public void setLastName()

The Person class should override the toString() method so it returns the first name and last name in this format:

Name: Frank Jones

Create a class named Customer that inherits the Person class and contains these constructors and methods:

public Customer(String first, String last, String number)

public String getCustomerNumber()

public void setCustomerNumber(String number)

The Customer class should override the toString() method so it returns the value returned by the toString() method of the Person class appended with the customer number, like this:

Name: Frank Jones
Customer Number: J54128

Create a class named Employee that inherits the Person class and contains these constructors and methods:

public Employee(String first, String last, String ssn)

public String getSsn()

public void setSsn(String ssn)

The getSsn() method should return a masked version of the social security number that only reveals the last four numbers.

The Employee class should override the toString() method so it returns the value returned by the toString() method of the Person class appended with the social security number, like this:

Name: Frank Jones
SSN: xxx-xx-1111

Use the Console class presented in chapter 7 or an enhanced version of it to get and validate the user’s entries.