Assume the existence of a window class with methods getwidth and getheight, and a subclass titledwindow, with a constructor accepts a string corresponding to the title of the window. declare a variable, twindow, of type titledwindow variable, and initialize it to a titledwindow object with a title of "my title". print out the width and height of the window (in that order) separated by a space. window (in that order) separated by a space.