Consider the following linear programming problem: Minimize Z=14X1+7X2 Subject to: X110X232X1X204X1+2X220X1,X20 a) Solve the above problem using the graphical solution method. Clearly draw the constraints and the iso-cost objective function line. Indicate the optimal solution in terms of decision variables values and the Z-value of Objective Function. b) Are there multiple optimal solutions to this problem? Explain why there are multiple optimal solutions for this problem. c) Is there a redundant constraint in the problem? Fully justify your