2 or ever, for .It turns positive on 4). tion and eir own the field a 11 b C d a b C d a 20 a 20 a d d 00 b 590 a b b b C d C C Od d The multiplication table above is defined on the set S = {a, b, c, d}.it misilqum bas ne 5. Is S closed under o? 6. Compute ab. 0 7. Is commutative in S? Why or why not? + 8. Is associative in S? Why or why not? 12 do domage and ab 2noon maid 9. Does S have an identity with respect to ? If so, what is it? b 2)