in java A class Book is designed to model a book written by one author. It contains: Four private instance variables: name (String), price (double) static, and qty (int); Two constructors: public Book...

in java A class  Book is designed  to model a book written by
one author. It contains:

• Four private instance variables: name (String), price (double) static, and qty (int);


• Two constructors:


• public Book (String name, double price) { ...... }


• public Book (String name, double price, int qty) { ...... }


• getters/setters methods getName(), getPrice(), setPrice(), getQty(), setQty().


• A toString() that returns book values.

A class called Author is designed to model a book's author. It contains:

• Four private instance variables: name (String), email (String), and gender (char of either 'm' or 'f') and arrayList of Books.


• One constructor to initialize the name, email and gender with the given values;

public Author (String name, String email, char gender) {......}

• public getters/setters.
  
  A toString() method that returns author object.


• A method addBook(Book b) which will add book in the Arraylist of books.


• A removeBook(String name) method which remove particular book form the list.

Also write a test driver called  to test all the public methods in the class Author.