16-19 Directions Use the Contrapositive equivalence on the statements in Column A and find the answer among the choices a, b, c, d, e, in Column B. Column A Column B 16) ~CA ( b > ~a ) a) ~ ( CA ~ a ) > ~ (cA~b ) 17) ~c > ( ~bla ) b ~ ( ~b > ~ c ) > (c/ ~a ) 18) ( ~ b > ~ a ) > ~c C ~ CA (a > ~b ) 19) ~ ( CA ~ a ) 7 ( ~b -> ~ c ) d) (a > b ) 7 ~c e) ~ (~b / a) > c 20 Form the commutative equivalence of: ~c > (bV~a). Your answer should be one of the choices below: A, B, C, D. A ( b V ~ a ) 7 ~ c B ( ~c ) b ) V ( ~c ) ~a ) C ~cy (~aV/b ) D ~(b V ~a) >c 21 Form the DeMorgan's equivalence of: [c > ~(bA ~a) ]. Your answer should be one of the choices below: A, B, C, D. A [c ) ( ~ bA ~ a ) ] B [~c > (bVa ) ] C (b/~a) 7 ~c D c (~bV a )