Question: Consider a complete undirected graph G = ( V , E ) in which all edge lengths are either 1 or 2 . Propose a

Consider a complete undirected graph G =(V, E) in which all edge lengths
are either 1 or 2. Propose a 4/3-approximation algorithm for the Traveling
Salesman Problem on such graphs.
Hint: A 2-matching is a subset S of edges such that every vertex has exactly
2 edges of S incident on it. For a start, find a minimum 2-matching in G. You
may assume that a 2-matching can be found in polynomial-time.
the algorithms that have been given to me on this website are not cloear and the approximation ratio proof is unclear , please give me an algorithms with detailed steps and detailed proof of approximation explaining why we get a 4/3-approximation ratio

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