please answer part c

The Action Toy Company has decided to manufacture a new train set, the production of which is broken into six steps. The demand for the train is 4,800 units per 40 hour workweek Predecessors Task A B D E F Performance Time (seconds) 20 30 15 15 10 30 A B, C DE This exercise only contains parts b, c, d, e, and t. b) Given the demand, the cycle time for the production of the new train set = 30 seconds (round your response to one decimal place). c) The theoretical minimum number of workstations (round your response up to the next whole number)