'Recall that an Eulerian circuit is path that crosses every edge of & graph exactly once and ends where it starts We can also define Hamiltonian circuit to be & path through the graph that crosses every vertex exactly once_ Note that in an Eulerian circuit_ vertices may show up more than once, but in a Hamiltonian circuit_ not every edge will necessarily appear Determine whether each graph below has an Eulerian circuit and whether or not i has Hamiltonian circuit. If such paths exist, find them; if not, show what the trouble
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