A cleaning tool requires a constant 5 minutes to polish a part. Parts arrive at the tool for processing at the rate of one part every 10 minutes.
a. On average, what percent of the time is the cleaning tool busy?
b. On average, how many parts are waiting to be cleaned?
c. On average, how many parts are in the cleaning process?
d. On average, how long does a part spend waiting before beginning processing?
e. On average, how long does a part spend in the cleaning process?