The operation Θ is defined on the set S = {a, b, c}, as shown in the following table. For example, a Θ b = b and b Θ a = b.
a. Is S closed with respect to Θ ?
b. Is Θ commutative on S?
c. Is there an identity for Θ on S? If yes, what is it?
d. Try several examples to investigate the associative property for Θ on S.
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