I know how to calculate those metrics if there is a single M/M/1/K queueing system. but what if there are 2 independent M/M/1/K queueing systems? Given the probability of going to the first system is p, and the probability of going to the second system is (1-p). How can I calculate blocking probability, average number of packets, average delay, and average throughput when there are 2 independent M/M/1/K systems