Consider a worker-paced line with three process steps, each of which is staffed with one worker. The sequence of the three steps does not matter for the completion of the product. Currently, the three steps are operated in the following sequence (numbers indicate processing time of each step):
Step A
3min/unit
Step B
4min/unit
Step C
5 min/unit
If the process were operated as a pull system, what would be the throughput rate of step A?