please help fix part 2 and 3

c. Maximize Z=6A+3B (revenue) Subject to Material 26A+6B6e9lb Machinery 25A+20B1, 009 hour Labor 20A+3eB1,200 hour A,B 1. What are the optimal values of the decision variables and Z ? 2. Do any constraints have (nonzero) slack? If yes, which one(s) and how much slack does each have? The third constraint has a slack of 120 . The second constraint has a slack of 60 . The first constraint has a slack of 80 . 3. Do any constraints have (nonzero) surplus? If yes, which one(s) and how much surplus does each have? None of the constraints have any surplus. The second constraint has a surplus of 15 . The first constraint has a surplus of 20 . 4. Are any constraints redundant? If yes, which one(s)? Yes, the first constraint is redundant. Yes, the second constraint is redundant. No, there are no redundant constraint