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a. A graph is called k-regular if every vertex has degree k. Explain why any k-regular...

a. A graph is called k-regular if every vertex has degree k. Explain why any k-regular graph with 11 vertices must conain an Euler circuit. (Hint – think of the possible values of k). b. If G is a 6-regular graph, what is the chromatic number of G? Must it be 6? Explain

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