Steps and clarification would be appreciated

Assume float a = 7.0, b = 4.0, c = 3.0, d = -2.0, e=10.; for questions 1-6:

Evaluate the following postfix (RPN Reverse Polish Notation) expressions:

1. abc+/d*

2. abcd+/*

Evaluating the following using a stack to store operands as done in class. Show all states of the stack and intermediate results.

3. ab-c/d*

Convert from infix to postfix: (6)

4. a * b + c d

5. (a + b) / c + d

Convert from infix to postfix using a stack for operands as done in class. Show all states of the stack and intermediate results.

6. (a + b) / c d + e