(1) How many 2-permutations of the set (a, b, c, d, e} are there? List them all. (2) Compute these permutation and combination numbers, showing your work: (a) P(6,3) (b) P(5,5) (c) C(5,5) (d) C(8,4) (e) C(6,0)

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Topological Sort

Topological sort is a sorting technique that sets up a hierarchy in a process. In this technique, when a directed network has nodes connected by arrows, the root node is placed before the successor node.