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1) Determine whether the relation defined on these positive integers is reflexive, symmetric, antisymmetric, transitive. a) (x, y) R if 2 divides x y b) (x, y) E R if 3 divides x y c) Give an example of a relation on {l, 2, 3, 4) that is reflexive, not antisymmetric, and not transitive. 5, 2n + 2, find For the sequence a defined by an (a) a (b) d i=1 7. Let (a) Find bs and bio- (b) Find a formula for b (c) Is b increasing