Problem: Passengers for the flight AC402 from Toronto to Montreal on Monday arrive to Pearson airport according to a Poisson process. The check-in process follows an exponential distribution and there are 3 counters open for check-in where passengers form a single line and go to the first available counter. Which of the following queueing models fits the above scenario best?
a M/M/3 with finite calling population
b M/M/3 with finite queue capacity
c M/M/3
d 3 separate M/M/1 queues with finite queue capacity
e 3 separate M/M/1 queues with finite calling population