4. Let n N with n ≥ 2 and let G₁ = (V, E) be the graph with vertex set V = {V₁, V2,..., V2n} and edge set E = {{vi, Vi+1} 1 ≤ i ≤ 2n-1}{V₁, V2n} {{vi, Un+i} |1 ≤ i ≤n}. These graphs are called "wheel graphs", G₂ and G3 are drawn below. V1 V2 V1 V2 V6 G₂ M VA V3 05 V3 G3

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