Create an application that simulates an old-school stack calculator that uses Reverse Polish Notation (RPN).

Example Console Display

Welcome to the Stack Calculator.

Commands: push n, add, sub, mult, div, clear, or quit.

stack> push 4

4.0

stack> push 3

3.0

4.0

stack> push 2

2.0

3.0

4.0

stack> mult

6.0

4.0

stack> add

10.0

stack> clear

empty

stack> quit

Thanks for using the Stack Calculator.

Specifications

• The calculator should be implemented as a separate class named StackCalculator.