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8. (15 points) Determine whether R is a tree, if it is, draw the digraph and find the root. a. A - (a, b, c,

8. (15 points) Determine whether R is a tree, if it is, draw the digraph and find the root. a. A - (a, b, c, d, e, f), and R (a, b), (c, e), (f,a), (G.c),(,a)) 7.1, 5

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