Hi, for this question I am confused on the issue of header and .cpp file. Could someone kindly provide the answer, if possible? Thanks

Write a C++ class called Book, which inherits from the Publication class given below. A Book has a year and a publisher and has its own display() method which prints out all information about a book, i.e. author, title, year and publisher. Book should also have a constructor which allows all book information to be initialised and a destructor which prints out a message when a Book object is destroyed. Explain the meaning of the virtual keyword, used in the definition of the display() method. class Publication protected: string author, title; public: Publication(string ar, string tl) : author (ar), title(tl) ( ) virtual void display() cout