Can you help me solve this question using excel?

7-35 Graphically solve the following problem: Maximize profit = 8X1 + 5X2 Subject to X1 + X2 ≤ 10 X1 ≤ 6 X1, X2 ≥ 0 a) What is the optimal solution? b) Change the right-hand side of constraint 1 to 11 (instead of 10) and resolve the problem. How much did the profit increase as a result of this? c) Change the right-hand side of constraint 1 to 6 (instead of 10) and resolve the problem. How much did the profit increase as a result of this? Looking at the graph, what would happen if the right-handside value were to go below 6?