Question: 2. Let (G, s, t, c) be a flow network, G = (V, E). A directed edge e = (u, v) is called always full

2. Let (G, s, t, c) be a flow network, G = (V, E). A directed edge e = (u, v) is called always full if f(e) = c(e) for all maximum flows f; it is called sometimes full if f (e) = c(e) for some but not all maximum flows; it is called never full if f (e)

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