Assume the existence of a class GraphicProgram with a string member, executableName, and data member, windowPtr, of type Window* (where Window is also a class type). Assume further that the Window class has a function called clone, that takes no parameters and returns a pointer to a new copy of the Window. Write a copy constructor for the GraphicProgram class that uses the clone function to make a proper copy of the Window member (rather than simple member assignment). The executable member may be copied using simple member assignment.