Question: Consider a graph G = ( V , E , w : E - > R > = 0 ) where V is a set

Consider a graph G =(V,E,w : E -> R>=0) where V is a set of vertices, E is a set of (directed) edges, and w is a weight function that maps edges to weights where each weight is >=0. Let us start a DFS search from vertex a, the goal of which is to find vertex b (where b = a). In the worst case, where is the goal vertex b in relation to the source vertex a in the DFS expansion. How many vertices and edges must the expansion contain before when we reach b? What about the best case?

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