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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-col

Can some one please help me with this two questions.
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daで.asth, atmost 6 vertice요 vesutese anan uoith n vertros, and hat au Burry-le planar muest Centain a vutee v ot depre at me91 om m vesdtics has chrom num!υγη. Josu that it is atleast n, ted dlitferent coloxs is necessay, taho an Coloring b kn and l

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