6. The Dynaco Manufac- turing Company pro- duces a particular product in an assem- bly line operation. One of the machines on the line is a drill press that has a single as- sembly line feeding into it. A partially com- pleted unit arrives at the press to be worked on every 7.5 minutes, on average. The machine operator can process an aver- age of 10 parts per hour. Determine the average number of parts waiting to be worked on, the per- centage of time the operator is working, and the percentage of time the machine is idle.

Fig: 1