Create a Class LAB ACTIVITY $40\mathrm{.}1\mathrm{.}1$: Create a Class open$\_$in$\_$newfullscreen$2/10$ For this lab, you will write a class that represents a book. The Book class will support the following hidden state: title as a Java String author$($s$)$ as an ArrayList of String ISBN as a Java String number of pages as an integer retail price as a double publisher as a Java String Your Book class must support the following interface: public Book$($String title, String isbn, int np$,$ double rp$,$ String publisher, String $...$ authors$)$ public String getTitle$()$ public String getIsbn$()$ public int getNumberOfPages$()$ public double getRetailPrice$()$ public String $[]$ getAuthors$()$ public String toString$()$ For example, the Java statement statements: Book b $=$ new Book$("$Java How to Program", $"978-0131016217",1400,19\mathrm{.}97,$ "Prentice$-$Hall", "Harvey M$.$ Deitel", "Paul J$.$ Deitel" $)$; System.out.printf$("\%$s$\%$n$",$ b$)$; should produce the following output: That is$,$ the toString$()$ should produce a string that has the book object state in this order title authors $($comma separated with space after the comma inside $[]$ number of pages retail price publisher ISBn inside $<>.$ If the constructor receives a null value for any of the String state, that state should be set to "Unknown". If no authors are given, the ArrayList should contain a single string "Unknown". For example, the Java statement: Book b $=$ new Book$($null$,$ null, $5,20\mathrm{.}10,$ null$)$; System.out.printf$("\%$s$\%$n$",$ b$)$; should produce the output