Exercise 5. Consider the topology shown in Figure 2. Denote the three subnets with hosts (starting clockwiseat 12:00) as Networks A, B, and C. Denote the sub-nets without hosts as Networks D, E, and F. (a) Assign network addresses to each of these six subnets, with the following constraints: All addresses must be allocated from 214.97.254/23; Subnet A should have enough addresses to support 250 inter- faces; Subnet B should have enough addresses to support 120 interfaces; and Subnet C should have enough addresses to support 120 interfaces. Of course, subnets D, E and F should each be able to support two interfaces. For each subnet, the assignment should take the form a.b.c.d/x or a.b.c.d/x e.f.g.h/y. (b) Using your answer to part (a), provide the forwarding tables (using longest prefix matching) for each of the three routers. 223.1.1.1 223.1.1.4 223.1.13 223.1.9.2_R1 -223.1.7.0 223.1.9.1 223.1.7.1 R2 R3 223.1.8.1 223.1.8.0 223.1.2.6 223.1.3.27 223.1.2.1 223.1.2.2 223.1.3.1 223.1.3.2 Figure 2: Routers interconnecting subnets