Question: Prove that the following two languages are in the class NP . Which of these is in P ? Which of them is in coNP?

Prove that the following two languages are in the class NP. Which of these is in P? Which of them is in coNP?
P1={G|G is an undirected graph with a cycle on exactly 100 vertices.}
P2={(G, k)|k is a positive integer and G is an undirected graph with a cycle on exactly k vertices}

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