Given the following line balance data: Task Predecessor Time (seconds) t ---- 15 u t 14 v t 7 w u 6 x v 8 y w, x 10 z y 21 a) Please draw the precedence diagram of the process. b) What is the minimum possible cycle time? What is the maximum possible cycle time? c) For eight hours of operating time per day and a desired output rate of 960 units per day, what is the minimum number of stations needed to achieve the appropriate cycle time? d) Assign tasks to workstations in order of position weight, tiebreaker most following tasks. e) What is the efficiency?