P5. (14 pts.) Consider users A and B who share a link with rate of Rs=1000bps to send their data. Both users generate two consecutive packets of L-1000 bits length and these packets arrive at the switch through two dedicated links of each 500bps rate. Please answer the following questions. A RA = 500 bps B Rs = = 1000 bps RB = 500 bps a. Assume that user B sends its first packet & seconds after user A sends its first packet. What is the average queuing delay at the switch (i.e., average queueing delay of the 6 packets at the switch and is a very small positive value)? (6pts) b. Now, assume that user B sends its first packet 1 second after user A sends its first packet. What is the average queuing delay at the switch? (4pts) C. Please compare parts (a) and (b) in terms of the average queuing delay at the switch and traffic intensity in the switch. Also, explain the reasons for the difference in the results of part (a) and (b) if any. (4pts)