G. a single server queue has exponential arrivals with a rate of 20 per hour. the service distribution is such that the mean number of customers that can be served is 24 per hour. the standard deviation is 2.0 minutes for the service distribution. obtain the steady mean number in the queue and also the mean waiting time in the queue. if the service distribution were exponential how would the standard deviation of the service times change? what would the steady state mean number in the queue and the waiting time in the queue be in this case?