Question: 4. The post office uses a multiple channel queue, where customers wait in a single line for the first available window. If the average service

4. The post office uses a multiple channel queue, where customers wait in a single line for the first available window. If the average service time is 1 minute and the arrival rate is 7 customers every five minutes, find, when two service windows are open,

a. the probability both windows are idle.

b. the average time a customer is in line.

c. the average time a customer is in the post office.

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