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Drivers arrive at the motor vehicle bureau with one server in a poison fashion with mean 6/hr. the time required to serve them is exponential

Drivers arrive at the motor vehicle bureau with one server in a poison fashion with mean 6/hr. the time required to serve them is exponential with mean 8 minutes.

Find:

The expected queue length,

The expected waiting time,

The expected time in the system,

The probability of the system being in state 2.

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