Question: The complete bipartite digraph Km,n is based on two disjoint sets of, respectively, m and n vertices. Each vertex in the first set is connected

The complete bipartite digraph Km,n is based on two disjoint sets of, respectively, m and n vertices. Each vertex in the first set is connected to each vertex in the second set by a single edge.
(a) Draw K2,3, K24, and K3,3.
(b) Write the incidence matrix of each digraph.
(c) How many edges does Km,n have?
(d) How many independent circuits?

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