Question: 7. Let G be the graph below. G (a) Find x(G), the chromatic number of G, and provide a k-colouring of G where k

7. Let G be the graph below. G (a) Find x(G), the chromatic number of G, and provide a k-colouring of G where k = x(G). (b) By modifying the graph G suitably, exhibit a simple graph G' that contains no subgraph isomorphic to K4 but has chromatic number 4.

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