4. F our parts (A, B, C, and D) are processed through a sequence of four operations (7, 2, 3, and 4). Not all parts are processed in all operations. Part A, which has Weekly quantities of 1000 units, is processed through operations 1, 3, and 2 in that order. Part B, which has weekly quantities of 2000 units, is processed through operations 2, 1, and 4 in that order. Part C, which has weekly quantities of 3000 units, is processed through operations 3, 2, and 4 in that order. Finally, part D, which has weekly quantities of 4000 units, is processed through operations 4, 1, and 3 in that order. a. Draw the network diagram b. Prepare the From-To table for this work system c. Use the Hollier algorithm to determine the most logical in-line sequence of workstations in the work system, Compute the percentage of in-sequence moves, backflow moves, and by- passing moves for the sequence. d