Q3. Class Book (20 marks) Book is also a specialized Reference that has information about the publisher of this reference. It also has number of pages as one of its attributes. 1. Book is a derived class of Reference 2. It stores the publisher (type string or char*) of this reference and the number of pages of this book (type int); 3. It also implements the member functions getNumberOfPages(), which returns the number of pages of this reference. In the case of Book reference, the number of pages is a single number, therefore, the member function simply returns this number; 4. It also implements functions related to the publisher Q1. Class Reference (20 marks) Implement a class, called Reference, to represent the characteristics that are common to all the References. Namely, 1. All references must have a unique identifier (of type int). 2. All references have a title and author (both of type string or char*), as well as year of publication (of type int); Write the Program in C++ Plz