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6.13 In an assembly plant, material handling between departments is performed using a uni- directional closed-loop conveyor. The figure below shows the layout for the modular A B P/D#3 P/DA2 BE Warehouse module P/D#1 Conveyor flow P/D#4 P/D#5 E D C facility, which consists of three equal-sized assembly modules (A, B, and C), one admin- istrative module (D), and one warehouse module (E). P/D points for each module are also shown in the figure. The administrative and warehouse activities are not to be moved; however, assembly areas A, B, C can be relocated. The distance between P/D points and the number of pallet loads moved between departments are given below. From To D E 60 Distance between P/DS From Distance P/D1 P/D2 P/D2 P/D3 90' P/D3 P/D 4 30' P/D 4 P/D5 90' P/D5 P/D1 60 0 Pallet Flow per Day B 0 0 5 10 0 25 25 5 0 0 0 0 A B D 0 0 0 30 0 0 0 E 5 20 5 0 0 Using the pairwise exchange method, determine new locations for assembly modules A, B, and C that minimize the sum of the products of pallet flows and conveyor travel distances