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Question 4. Four machines should be located in a department along an aisle. The dimensions of the machines and the material handling trips between them are given below. Consider aij = 4 and cij=1. Decide about the placement order. Calculate the total cost for the optimal placement. Number of Trips 1 2 3 4 1 16 4 2 1 1 6 3 11 8 1 10 3 Machine Dimensions Machine 1 2 3 4 Dimensions 4X4 6X6 4X4 2X2