Benny's Arcade has six video game machines. The average time between machine failures is 25 hours. Jimmy, the maintenance engineer, can repair a machine in 15 hours on average. The machines have an exponential failure distribution, and Jimmy has an exponential service-time distribution.

a. Jimmy's utilization is ___. (Enter your response rounded to three decimal places.)

b. The average number of machines out of service, that is, waiting to be repaired or being repaired is ___ machines. (Enter your response rounded to two decimal places.)

c.The average time a machine is out of service is ___ hours. (Enter your response rounded to two decimal places.)