Consider the following Fig.4, where several subnets are interconnected by two routers, i.e., R1 and R2. Fig. 4 1. If the interface of R1 in subnet 2 has an IP address 192.168.2.1, assign IP addresses to all the other interfaces in subnet 2 , and also, show the network mask you used for those IP addresses, ( 6 points) 2. Assuming the interface of A has IP address 192.168.1.2, and the adapter for that interface has MAC address aa-aa-aa-aa-aa-aa; the interface of RI in subnet I has IP