Question: Show that edge (u, v) is a. a tree edge or forward edge if and only if d[u] < d[v] < f[v] < f[u], b.

Show that edge (u, v) is
a. a tree edge or forward edge if and only if d[u] < d[v] < f[v] < f[u],
b. a back edge if and only if d[v] < d[u] < f[u] < f[v], and
c. a cross edge if and only if d[v] < f[v] < d[u] < f[u].

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