Solve the following LP model. a. Develop a spreadsheet model and find the optimal solution using Excel Solver. b. What is the optimal solution? What is the optimal objective function value?   Maximize Z = 5x1 + 8x2 subject to    3x1 + 5x2 <= 60    2x1 + 5x2 <= 55    12x1 + x2 <= 120    x1 , x2 >= 0

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