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4. Suppose R and S are relations on {a, b, c, d}, where R = {(a, b), (a, d), (b, c), (c, c), (d, a)

4. Suppose R and S are relations on {a, b, c, d}, where R = {(a, b), (a, d), (b, c), (c, c), (d, a) } and S = {(a, c), (b, d), (d, a) }. Find the followings. [20 pts.] a. R3 b. $3 c. ROS d. RUS e. S - R

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