Draw a graph having the given properties stated below, orexplain why no such graph exists: In each case assume simple graphs(no self loops and no parallel edges) a. Six vertices each withdegree 3 b. Five vertices each with degree 3. c. Four vertices eachwith degree 1. d. Six vertices and four edges. e. Four edges; fourvertices having degrees 1, 2, 3, and 4.