A manager wants to assign tasks to workstations as efficiently as possible and achieve an hourly output of 331/3 units. Assume the shop works a 60-minute hour. Assign the tasks shown in the accompanying precedence diagram (times are in minutes) to workstations using the following rules:

a. In order of most following tasks. Tiebreaker: greatest positional weight.
b. In order of greatest positional weight. Tiebreaker: most following tasks.
c. What is theefficiency?

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0.6 0.5 1.4 0.5 0.5 1.0