Trucks arrive at a receiving dock in a Poisson fashion at a mean rate of 2 per hour. The trucks can be unloaded at a mean rate of 3 per hour in a Poisson fashion (so long as the receiving dock is not empty). (a) What is the average number of trucks being unloaded and waiting to get unloaded? (b) What is the mean no of trucks in the queue? (c) What is the mean time a truck spends waiting in the queue?

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