Write a Book class (Book.java) and test it with the provided TestBook.java. Your Book class should be implemented with: (1) instance variables: bookTitle (private string); numPages (private int); authorName (private string); price (private double); (2) constructors a default constructor (set your book title as "Unknown Book", num of pages as 0, author Name as "ABCD", price as 1.0) a user-defined constructor (take four input arguments in the order of book title, number of pages, author name and price. Assign each argument to the corresponding instance variable) (3) getters and setters a setter method setPrice to change the price a getter method getNumOfPages to return the number of pages as an integer (4) two methods method name: pricePerPage - calculate the price per page (price / numPages) and return it as a double method name: toString - return a long string, which must include the values of bookTitle, numPages, authorName and price. This is the TestBook.java. code.

1. Write a Book class (Book.java) and test it with the provided TestBook.java.
Your Book class should be implemented with:
(1) instance variables:
bookTitle (private string);
numPages (private int);
authorName (private string);
price (private double);
(2) constructors
a default constructor (set your book title as "Unknown Book", num of pages as 0, author Name as
"ABCD", price as 1.0)
a user-defined constructor (take four input arguments in the order of book title, number of pages,
author name and price. Assign each argument to the corresponding instance variable)
(3) getters and setters
a setter method setPrice to change the price
a getter method getNumOfPages to return the number of pages as an integer
(4) two methods
method name: pricePerPage - calculate the price per page (price / numPages) and return it as a
double
method name: toString - return a long string, which must include the values of bookTitle,
numPages, authorName and price.
This is the TestBook.java. code