The following precedence network is used for assembling a product. You have been asked to achieve an hourly output of 20 units. 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. Use greatest positional weight as a tiebreaker. What is the utilization (%) of the worker in the workstation 12 28 d 1.0 3.0 0.7 0.1 c h 0.8 20 a. 72 b. 100 c. 96.5 d. 93.33 e. 92 f. 67.5 6. 50 h. 60 i. none of the above