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please solve this one 5-12. [5] The square of a directed graph G = (V,E) is...

please solve this one

5-12. [5] The square of a directed graph G = (V,E) is the graph G2 = (V,E2) such that (u,w) ∈ E2 iff there exists v ∈ V such that (u,v) ∈ E and (v,w) ∈ E; i.e., there is a path of exactly two edges from u to w.
Give efficient algorithms for both adjacency lists and matrices.
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