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People go to a local bank ( with one banker available ) every 5 minutes exponentially distributed. The time to serve a customer is exponentially distributed with a mean of 4 minutes. Calculate as many statistices as you can.
L = expected number of entities in the system (number in the queue and in service)
Lq = expected number of entities in the queue (queue length)
W = expected time in the system (flow time)
Wq = expected time in the queue (waiting time)