A manager wants to assign tasks to workstations as efficiently as possible and achieve an hourly output of 33 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:

1. In order of most following tasks. Tiebreaker: greatest positional weight.

Station	Tasks assigned	Total time at station	Idle time at station
1
2
3
4

2. In order of greatest positional weight. Tiebreaker: most following tasks.

Station	Tasks assigned	Total time at station	Idle time at station
1
2
3
4

3. What is the efficiency?

efficiency is % (two decimal places)