Question: Need help.... Problem 4: For each of the two graphs below, determine whether they are planar. Justify your answer: If the graph is planar, show

Need help....

Problem 4: For each of the two graphs below, determine whether they are planar. Justify your answer: If the graph is planar, show its planar embedding. If the graph is not planar, use Kuratowski's theorem to prove that it is not. 8 5 Problem 5: Find the chromatic number of the graph below. Justify. 5 6

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