12. Consider the following simple, undirected graphs: (12 points) 1 25 45 U2 V1 16 14 U8 U6 V8 U U3 U2 U3 (a) Show that these graphs are isomorphic. (b) Does either graph have an Eulerian path? If so, construct one; if not, explain why. (c) Does either graph have a Hamiltonian path? If so, construct one; if not, explain why