Use this information for the next three questions:

Calls come in to a call airline customer service center and are answered by a single technician. Time between calls averages 10 minutes. Mean service time is 1/8 of an hour. Both the time between arrivals and the service time are modeled as draws from an exponential distribution.

1.What is the mean time in system for a call, in hours (give your answer as a decimal)?

2.What is throughput, in calls per hour?

3.What is the distribution of the number of calls leaving the system in an hour?(Select Answer Choice)

A. Exponential, mean 8

B. Exponential, mean 10

C. Exponential, mean 6

D. Poisson, mean 10

E. Poisson, mean 6

F. Poisson, mean 8