.4 Determine the Eulerian and/or Hamiltonian nature of the graph shown below, containing five vertices (nodes) and seven undirected edges. (a) The above graph is Eulerian. The above graph is Hamiltonian. (b) The above graph is Eulerian. The above graph is not Hamiltonian. (c) The above graph is not Eulerian. The above graph is Hamiltonian. (d) The above graph is not Eulerian. The above graph is not Hamiltonian