a. The control factor for the process of precutting the rafters of the truss of Figure 2 is 12 s based on the cutting rate of one saw. What is the maximum number of precut rafters that can be produced using one saw in a 40-min hour when labor supply is unlimited?

b. Using a crew of two workers (one worker carrying material and one saw operator) with one saw, the cycle time for precutting rafters is 54 s. Using this crew, how many 50-min hours would it take to precut the rafters for 200 trusses?