Question: Give an example of a graph in which every node is pivotal for at least two dierent pairs of nodes. Explain your answer. Give an

Give an example of a graph in which every node is pivotal for at least two diﬀerent pairs of nodes. Explain your answer. Give an example of a graph having at least four nodes in which there is a single node X that is pivotal for every pair of nodes (not counting pairs that include X). Explain your answer.

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