Suppose we run DFS starting at vertex a of the graph below. Suppose the algorithm explores neighbor vertices in alphabetical order (e.g., the function explore(a) will consider explore(b) before explore(c)). Suppose the clock starts at 1 (i.e., the pre number of a is 1). a e d h What is the pre and post numbers of vertex e and vertex g? pre number of e = post number of e = pre number of g = post number of g = bo

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A:

Q: Explain the differences between the hierarchical, network, and relational database models.

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