assume that a = 7.0, b = 4.0, c = 3.0, and d = -2.0. Evaluate the postfix expression.

2. a b c + / d * 4. a b + c + d +

For the postfix expressions in Exercises 12-14, trace the algorithm for evaluating postfix expressions by showing the contents of the stack immediately before each of the tokens marked with a caret is read. Also, give the value of the postfix expression. 1) 32 5 3 + / 5 *

^ ^

2)2 17 - 5 / 3 *

^ ^