Carefully study Overlay Network in the textbook and other sources. Consider an overlay network with M active peers, with each pair of peers having an active TCP connection. Additionally, suppose that the TCP connections pass through a total of N routers. How many nodes and edges are there in the corresponding overlay network? Draw a graph to show the network for M = 7 and N = 3.

Personal comment: I understand that there are M nodes and M(M-1)/2 edges, however I am not sure how to graph a network with M = 7 and N = 3? Am I just supposed to graph them all connecting to each other without routers?