Question: 3. [10 marks] Show how a stack can be used to evaluate the postfix expression 2 4 * 3 + 1 5 - * =.
3. [10 marks] Show how a stack can be used to evaluate the postfix expression 2 4 * 3 + 1 5 - * =. The first two steps are given below:
1. Push 2
2. Push 4
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