Question: The subgraph-isomorphism problem takes two undirected graphs G 1 and G 2 , and it asks whether G 1 is isomorphic to a subgraph of

The subgraph-isomorphism problem takes two undirected graphs G₁ and G₂, and it asks whether G₁ is isomorphic to a subgraph of G₂. Show that the subgraph-isomorphism problem is NP-complete.

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