Write a program to implement the algorithm for evaluating postfix expressions that Involve only single-digit integers and the integer operations +, -, *, and /. To trace the action of postfix evaluation, display each token as it is encountered, and display the action of each stack operation. For example, the output of your program might resemble the following for the postfix expression 2 7 4 * 4 / +.

Token: 2 Push 2

Token: 7 Push 7

Token: 4 Push 4

Token: * Pop 4 Pop 7 Push 28

Token: 4 Push 4

Token: / Pop 4 Pop 28 Push 7

Token: + Pop 7 Pop 2 Push 9

Token: Pop 9