b. Maximize z=2x1+10x2 Subject to Durability 10x1+4x24 week Strength 1x1+6x224 psi Time 1x1+2x214 hour x1,x2 1. What are the optimal values of the decision variables and Z ? (Round your onswers to 2 declmal pleces.) 2. Do any constraints have (nonzero) slack? If yes, which one(s) and how much slack does each have? None of the constraints have any slack. The first constraint has a slack of 10 . The second constraint has a slack of 15 . 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 first constraint has a surplus of 20 . The second constraint has a surplus of 15 . 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