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 2 - 4x1 + 3x2 Subject to Material Labor 6X1 + 4x2 48 lb 4x1 + 8x2 80 hour X1, X2 20 1. What are the optimal values of the decision variables and Z? Decision Variables X1 X2 Z Optimal values 91 35 X11 X2 2 0 1. What are the optimal values of the decision variables and Z? (Round your answers to 2 decimal places.) Decision Variables X, X2 z Optimal values c. Maximize Subject to 2 = 6A + 3B (revenue) Material 20A + 6B S 600 lb Machinery 25A + 20B 1,000 hour Labor 20A + 30B S 1,200 hour A, B2 0 1. What are the optimal values of the decision variables and Z? Decision Variables B z Optimal values