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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)} and S={(a,c),(b,d),(d,a)}. Find the followings. [20 pts.] a. R3 b. S3 c. RS d.

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. S3 c. RS d. RS e. SR

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