P9. Consider the discussion in Section 1.3 of packet switching versus circuit switching in which an example is provided with a 1Mbps link. Users are generating data at a rate of 100kbps when busy, but are busy generating data only with probability p=0.1. Suppose that the 1Mbps link is replaced by a 1 Gbps link. a. What is N, the maximum number of users that can be supported simultaneously under circuit switching? b. Now consider packet switching and a user population of M users. Give a formula (in terms of p,M,N ) for the probability that more than N users are sending data