QUEUEING THEORY #1 B&K Groceries operates with three checkout counters. The manager uses the following schedule to determine the number of counters in operation, depending on the number of customers in line. # of customers in store 1 to 3 4 to 6 More than 6 # of counters in operation 1 2 3 Customers arrive to the counters area according to a Poisson distribution with a mean rate of 10 customers per hour. The average checkout time per customer is exponential with a mean of 12 minutes. Determine the steady state probabilities Pn of n customers in the checkout area. Note, the service rate of each attendant is 5 customers per hour.