Dynamic MathStack The MathStack class shown in this chapter only has two member functions: add and sub . Write the following additional member functions: Function Description 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. Using these header files IntStack.h // Specification file for the IntStack class #ifndef INTSTACK_H #define INTSTACK_H class IntStack { protected: int *stackArray; int stackSize; int top; public: IntStack(int); ~IntStack(); void push(int); void pop(int &); bool isFull(); bool isEmpty(); }; #endif and MathStack.h // Specification file for the MathStack class #ifndef MATHSTACK_H #define MATHSTACK_H #include "IntStack.h" class MathStack : public IntStack { public: MathStack(int s) : IntStack(s) {} void add(); void sub(); void mult(); void div(); void addAll(); void multAll(); }; #endif In C++