Question: (a) How many vertices and how many edges are there in the complete bipartite graphs K4,7, K7,11, and Km,n, where m, n, Z+? (b)

(a) How many vertices and how many edges are there in the complete bipartite graphs K4,7, K7,11, and Km,n, where m, n, ∈ Z+?
(b) If the graph Km 12 has 72 edges, what is m?

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