Consider a queueing system with two classes of customers. Type A customer arrivals are Poisson with rate λA and Type λB customer arrivals are Poisson with rate B. The service time for type A customers...

Consider a queueing system with two classes of customers. Type A customer arrivals are Poisson with rate λA and Type λB customer arrivals are Poisson with rate B. The service time for type A customers is exponential with rate µA and that for type B is exponential with rate µB. Each service time is independent of all other service times and of all arrival epochs.