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Question 4 [12 marks] 5- The subnet having the IP address: 222. 20.128.0/20 is allocated to an organization that has 4 departments, show how to subnet this network to 4 independent networks. Give the IP address of each subnet in binary and in dotted decimal notation (a.b.c.d/x) (show your steps, only final answer not accepted). Question 5 [6 marks] Dijkstra's algorithm is executed at node x by a link state protocol, this will generate the forwarding table that router x will use to forward the received packet to any destination in the topology. 1- What represents the different numbers associated to the links. 2- What compute Dijkstra's algorithm in order to generate the forwarding table. 3- complete the resulting forwarding table at node z