The total number of plates purchased from subcontractors should not exceed the number of plates manufactured. Given the long relationship between Larkin and subcontractor "Harjis", the total number of components purchased from "Sujal" should not exceed the total number of components purchased from "Harjis". The minimum number of Knobs manufactured is 300. a. Develop a linear programming model that would tell Larkin how to fill the exact order for 3100 door handles sets at the minimum cost. b. Solve the model in Microsoft Excel Solver. c. What is the optimal solution and the value of objective function at the optimal solution?