Given the graph below: which node should be the source node ("x") in finding the shortest path tree (SPT) such that the SPT is the same as the MST? In other words, if you try to find the shortest path from node "x" to all the other nodes, all the edges belong to the MST. 4 5 3 15 5 8 9 7 O a. 4 O b. 8 O c. None of the above O d. 5 e. 7

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Minimum Spanning Tree

A spanning tree is a sub-graph of a connected, undirected graph. It has all the vertices of a graph with the minimum possible number of edges. If a vertex is skipped, then it will not be a spanning tree. The edges of a spanning tree may or may not have weights.