A technician monitoring a group of five computers in an automated manufacturing facility. it takes an average of 15 minutes, exponentially distributed, to adjust any computer that develops a problem. the computers run for an average of 85 minutes, poisson distributed, without requiring adjustments. compute the following:
a. average number of computers waiting for adjustment
b. average number of computers not in working order.
c. probability the system is empty.
d. average time in the queue.
e. average time in the system.