Consider the tree arcs of a BFS traversal from a source node W in an unweighted, connected, undirected graph. The tree T formed by the tree arcs is a data structure for computing

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?