Calculate the rwl and the li for the following task. as forgings exit a cooling bath, they are loaded into various tumblers for finishing. each forging weighs 15 pounds and is lifted from a conveyor that is 36 inches high to a tumbler that is 48 inches high. the forgings are relatively small, so the hands are only 5 inches from the waist. the process completes a forging every 10 seconds. the coupling is considered fair, and the operator works a full 8-hour shift.