On graphs. (a) Which is the minimum number of edges that can be removed from K5 to get a planar graph? (b) List all non-isomorphic forests, which are not trees, on 6 vertices. - (c) Let X = {S, B, A, G} and Y {J, E, V, F}. Find a stable matching in the complete bipartite graph G(X, Y) according to the following preferences. S VEJ F J X preferences: B J V FE AE J V F GVFE J Y preferences: GSA B ES SBGA VGB SA F G BAS

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