Consider the relation R = {(a, 6), (6, 6), (6, c), (c, b), (c, c), (d, a), (d, c), (d, d)} on {a, 6, c, d}. (a) Draw the digraph for R. (b) Write the adjacency matrix for R with respect to vertices in alphabetical order. (c) Draw the digraph for Ro R.

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