Dynamic MathStack The MathStack class shown in this chapter only has two member functions: add and sub. Write the following additional member functions:

mult: Pops the top two values off the stack, multiplies them, and pushes their product onto the stack.

div: Pops the top two values off the stack, divides the second value by the first, and pushes the quotient onto the stack.

addAll: Pops all values off the stack, adds them, and pushes their sum onto the stack.

multAll: Pops all values off the stack, multiplies them, and pushes their product onto the stack. Demonstrate the class with a driver program