This problem has FIVE multiple choice questions. Choose the correct answer from each dropdown box.

Rocky Top hardware specializes in manufacturing steel bars. The process starts with raw material $($carbon steel wire$),$ and then progresses sequentially through five steps using machines A to E$,$ respectively $($see table below$).$ This is the only use that the five machines are put to$.$ The hourly throughput rates $($in lbs$/$hour$)$ for each machine are given below.