11. Explain how a private data of a base class can be accessed by a publicly derived class. 12. Explain the merits and demerits of private derivation over the public derivation. 13. What is a friend...

11. Explain how a private data of a base class can be accessed by a publicly derived class.

12. Explain the merits and demerits of private derivation over the public derivation.

13. What is a friend class? What are the access control a friend class has over the member function?

14. What is a public derivation? Explain how a private member of a base class can be accessed by the public member function of the derived class through public inheritance?