6. Consider the circuit-switched network in Figure 1.12. Recall that there are n circuits on each link. (10 pts) Host A Each link consists of n "circuits (TDM or FDM) End-to-end connection between Hosts A and B, using one "circuit" in each of the links Host B Figure 1.12. A simple circuit-switched network consisting of four switches and four links a) What is the maximum number of simultaneous connections that can be in progress at any one time in this network? b) Suppose that all connections are between the switch in the upper-left-hand corner and the switch in the lower-right-hand corner. What is the maximum number of simultaneous connections that can be in progress? 7. Consider the discussion in Section 1.3 of statistical multiplexing in which an example is provided with a 1Mbps link. Users are generating data at a rate of 100 kbps when busy but are busy generating data only with probability p = 0.1. Suppose that the 1 Mbps link is replaced by a 1 Gbps link. What is N, the maximum number of users that can be supported simultaneously under circuit switching? (10 pts)