C$++10\mathrm{.}6$ Create an application named ShapesDemo that creates several objects that descend from an abstract class called GeometricFigure. Each GeometricFigure includes a height, a width, and an area. Make sure the constructors are in the take in the height, then width as int.

Provide get and set accessors for each field except area; the area is computed and is read$-$only. Include an abstract method called ComputeArea$()$ that computes the area of the GeometricFigure.

Next you will create three additional classes derived from the GeometricFigure class. Name these derived classes: Rectange, Square, and Triangle.