Suppose users share a 1 Gbps link. Also suppose each user requires 25 Mbps when transmitting, but each user transmits only 10 percent of the time. . a) When circuit switching is used, how many users can be supported? b) For the remainder of this problem, suppose packet switching is used. What is the probability that a given user is transmitting? Suppose there are 60 users. Find the probability that, at any given time, exactly n users are transmitting simultaneously. Give your answer as an algebraic expression. (Hint: Use the binomial distribution.) c) d) With 60 users, what is the probability that there are 41 or more users transmitting simultaneously? Again, give your answer as an algebraic expression