Can someone please show me how to solve this step by step?

Label each of the following statements with =, S, 2, or NONE. Label a statement with = if equality always holds, with S or 2 if such inequality holds in general and strict inequality holds sometimes, and with NONE if none of the above holds. In all the queueing systems, arrivals are Poisson and have rate A, the average job size is E[S], and the trac intensity is such that the systems are stable. Unless otherwise stated, the speed of the servers is 1, as usual. (i) Expected delay of M/M/3/K vs. M/M/3/3K. (ii) Expected delay of M/D/l vs. M/G/l. (iii) Expected delay of M/M/l vs. M/G/l with G such that the variance of the jobs equals 3(E[S])2. (iv) Expected delay of M/M/l where the server has speed 3 vs. M/M/3. (v) Expected delay of M/M/ 1 vs. three M/M/l queues in tandem where each server has speed 3. (vi) Expected delay of M/M/ l with load ,0 = 0.5 vs. a system with average number of jobs equal to 2