please help with c

Solve these problems using graphical linear programming and answer the questions that follow. Use simultaneous equations to determine the optimal values of the decision variables. a. Maximize Z = 4x1 + 3x2 Subject to 6x14x2 = 48 lb Material Labor 4x1 + 8x2 80 hour X1, X2 0 1. What are the optimal values of the decision variables and Z? Answer is complete and correct. Decision Variables X1 X2 Z Optimal values 2 9 35 Z = 2x1 + 10x2 b. Maximize Subject to Durability 10x1 + 4x2 40 week Strength 1x1 + 6x2 = 24 psi Time 1x1 + 2x2 = 14 hour X1, X2 0 1. What are the optimal values of the decision variables and Z? (Round your answers to 2 decimal places.) Answer is complete and correct. Decision Variables X1 X2 Z Optimal values 1.50 6.25 65.50 Z = 6A + 3B (revenue) c. Maximize Subject to Material 20A + 6B 600 lb Machinery Labor 25A+20B 1,000 hour 20A + 30B 1,200 hour A, B2 0 1. What are the optimal values of the decision variables and Z? X Answer is complete but not entirely correct. Decision Variables A B Z Optimal values 2 8 x