Define the instance method inc_num_kids() for PersonInfo. inc_num_kids increments the member data num_kids. Sample output for the given program with one call to inc_num_kids():   Kids: 0 New baby, kids now: 1   Use Python, please.

QUESTION 3 Which of the following is true about Introduce parameter object refactoring technique?1. Does not work with Java2. The technique is used to increase performance as it requires less memory3. You will need to create a new structure (class) for the grouped data if that structure does not already exist 4.Used to to shorten methods

Solve using OOP in Java.

In C++ Create a new project named lab8_1. You will be implementing two classes: A Book class, and a Bookshelf class. The Bookshelf has a Book object (actually 3 of them). You will be able to choose what Book to place in each Bookshelf.  Here are their UML diagrams  Book class UML Book - author  : string- title   : string- id      : int- count   : static int + Book()+ Book(string, string)+ setAuthor(string) : void+ setTitle(string) : void+ print() : void+ setID() : void And the Bookshelf class UML Bookshelf - book1 : Book- book2 : Book- book3 : Book + Bookshelf()+ Bookshelf(Book, Book, Book)+ setBook1(Book) : void+ setBook2(Book) : void+ setBook3(Book) : void+ print() : void Some additional information: The Book class also has two constructors, which again offer the option of declaring a Book object with an author and title, or using the default constructor to set the author and title later, via the setters . The Book class will have a static member variable…