Code in C++ please, with some comments to understand, thank you

Q3. Class Book (10 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. Key Notes: All the classes should have At least a default constructor, a copy constructor and a destructor Accessing functions A print function