True /False 13. _There is only one copy of the class's member func- tions and that copy is shared among all the class's objects 14. Putting class definition in a separate file (e-g. head- er) makes it easy to reuse. 15. _A private data member of a class can usually be accessed from outside the class. 16. A member function of a class can call other private member functions of the same class. 17. _A destructor function can have parameters. 18. _A class can have objects of other classes as data members. 19. The following code is valid: int x-5 f (ptr!- mullptr) cout