Circuit/packet switching Suppose users share an 8 Mbps link. Also suppose each user requires a constant bitrate of 2 Mbps when transmitting, but each user transmits only 25% of the time.

a)When circuit switching is used, how many users can be supported?

b)For the remainder of the question, suppose packet switching is used. Will there be any queuing delay before the link if 4 or fewer users transmit simultaneously?

c)Find the probability that a given user is transmitting.

d)Suppose there are 5 users. Find the probability that at any given time, all 5 users are transmitting simultaneously. (2.5 points) Find the fraction of time during which the queue grows.