UPDATED:

Consider the relations R, S, T, U on the set a, b, c,dy. Use the definitions and properties discussed in class and chapter 9.1 and the properties or operations of irreflexive, asymmetric, inverse re- lations, and complementary relations mentioned before Rosen 9.1 # 11 (p. 581), # 18 (p. 582), and # 26 (p. 582). Let R = {(a, a), (b, c), (c, b), (c, d), (d, e), (d, d)), T = {(a, a), (a, b), (b, c), (b, d), (c, d), (d, a), (d, b), and