In this assignment, you will create a very particular calculator that works with up to 3 integer numbers at any time (rather than the usual 2). Any of the three input numbers may be negative,...

Extracted text: In this assignment, you will create a very particular calculator that works with up to 3 integer numbers at any time (rather than the usual 2). Any of the three input numbers may be negative, positive, or zero. The calculator works using the Reverse Polish Notation, that is, the desired operation is given by the user ahead of the numbers. 1. Ask the desired operation first. Valid inputs include any of the symbols in the left column of the table below to produce the calculation shown in the right column: 'e' or 'E' says how many of the positive inputs are even numbers (ex- clude zero)