4. (16 pts) An organization is assigned the following address space: 65.39.xx.0/23, where "xx" is given by the output of the program in Problem 1.a. The required minimum subnetwork capacities are the following: Ni 100 hosts, N2 200 hosts and N3 100 hosts. Assume the network interface name in regular hosts is eth0. The router interface names are shown in blue in the figure. (a) Assign and clearly indicate in your answer a network ID for each subnetwork and host addresses for R1, R2, A, B and C (do not assign any address to eth2 in R1). (b) Write the routing table for R2 and A (include default entry) using the following format: Network ID ??.??.??.??/?? Interface Gateway or Link eth? A N1 etho etho Internet eth2 R1 R2 eth 1 eth1 IN3 N2 B