The following table shows the tasks necessary for final assembly of a hospital bed, the length of time needed to perform each task, and the operations that must be completed prior to subsequent operations. a. Construct a precedence diagram. b. Calculate the cycle time necessary to complete 180 beds during a 42-hour week. What is the minimum number of workstations needed to meet this demand? With this minimum number of workstations, balance the line such that the highest efficiency is achieved. Calculate the efficiency. With this design, how many hours are needed to meet the weekly demand of 180 beds? c. Suppose that, during peak-demand seasons, the first priority is to maximize output (i.e., maximize the number of beds completed during any given period), and the second priority is to maximize efficiency. Balance the line according to the priority rule during peak-demand seasons. Calculate the efficiency. How many beds can be completed during a 42-hour week? Element Precedence Time A — 4 B — 5 C — 8 D A 4 E A, B 3 F B 3 G D, E 5 H F 7 I G, H 1 J I 7 K C, J 4.