4) Given the following class: class bookType public: void setBookTitle(string s); void setBookISBN(string ISBN): void setBookPrice(double cost); void setCopiesInStock(int noOfCopies); /sets the bookTitle to s //sets the private member bookISBN to the parameter /sets the private member bookPrice to cost /sets the private member copiesInStock to noOfCopies void printInfo0 const; /prints the bookTitle, bookISBN, the bookPrice and the l/copiesInStock string getBookISBNO const; /returns the bookISBN double getBookPrice) const; /returns the bookPrice int showQuantity InStock0O const; /returns the quantity in stock void updateQuantity (int addBooks); /adds addBooks to the quantityInStock, so that the quantity Win stock now has it original value plus the parameter sent to this function private: string bookTitle; string bookISBN double price; int quantity