Extra Credit Question (20 pts): If you do this, separate your answer into another pof file and send directly to Jun Fukuyama 3. Let A and B be two propositional statements, and A' and B' be their duals, respectively. This means that A' is obtained from A as follows: a. Restore all the implicit parentheses in A b. Replace by V, V by /, True by False, and False by True. c. Remove all the unnecessary parentheses. For example, if A is x v y z = x + yz = x + (yz), its dual A' is x . (y + z) = x ^ (y v z). if and only