12. The following precedence network is used for assembling a product. You have been asked to achieve an output of 240 units per eight-hour day. All times in this network are in minutes. Balance the line using the following rule: assign tasks to workstations on the basis of most following tasks (Rule 1). Use greatest positional weight (Rule 2) as a tiebreaker. What is the utilization (%) of the worker in the last workstation? 02 0.4 0.2 12 b + 0.4 10 2.0 Select one: a. 67.5 b. 40 c. None of the provided options d. 30 e. 100 f. 60 g. 50