Question: Can some one please help me with this two questions. Thank you! fact that every planar graph has a vertex of degree s 5 to

Can some one please help me with this two questions. Thank you!
fact that every planar graph has a vertex of degree s 5 to give a simple induction proof that every planar graph can be 6-colored. What can be said about the chromatic number of a graph that has Kn as a subgraph? Justify your
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