Rane Engineering is designing a product layout for a new CNC lathe. The firm has estimated that the demand will be 480 lathes per day. The production line is to be operated for 8 hours in a day. The firm's production planner has come up with a list of tasks, time taken for each, and immediately preceding tasks to produce the lathes (table given below). The production planner wants the output rate of the production line to equal demand. The theoretical number of workstations needed is (round up to a whole number)