Problem 9.12 Question Help Stanford Rosenberg Computing wants to establish an assembly line for producing a new product, the Personal Digital Assistant (PDA). The tasks, task times, and immediate predecessors for the tasks are as follows: Task Immediate Predecessor Time (sec) 12 14 A B A C A D 8 4 18 B, C D E Rosenberg's goal is to produce 170 PDAs per hour. a) The cycle time for the production of a PDA = 21.17 seconds (round your response to two decimal places). b) The theoretical minimum number of workstations that Rosenberg can achieve in this assembly line =(round your response up to the next whole number)