Suppose depth first search is executed on the graph below starting at some unknown vertex. Assume that a recursive call to visit a vertex is made only after first checking that the vertex has not been visited earlier. Then the maximum possible recursion depth (including the initial call) is _________.

In a depth-first traversal of a graph G with n vertices,k edges are marked as tree edges. The number of connected components in G is

Consider the following graph among the following sequences
I. a b e g h f
II. a b f e h g
III. a b f h g e
IV. a f g h b e
What are depth first traversals of the above graph?