Suppose that you have been given the network scenario as shown in the figure bellow. It consists of 3 routers and 4 switches, if you have the following address space (192.168.100.0/24) answer the following questions. 1) Suggest the minimum suitable block size and sub-network ID for each network: Sub-network Number of hosts Subuet block size P A B D 10 2) Build the network as shown in the Figure using Packet tracer tool (You must submit the packet tracer file after doing all configurations bellow) 3) Configure all routers and PC's and implements all necessary dynamic routes using (OSPF). All PCs should be able to ping each other. Test the connectivity between all PCs. 4) Configure all routers with password (123) on the console line and change the name of the routers to be as your name, fathers name and family name 5) Copy the running configuration for Router and past in the following space in this file 6) Copy the running configuration for Router2 and past in the following space in this file 7) Copy the running configuration for Router and past in the following space in this file