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3 Equivalences 1. Using truth tables as defined in Section 2.2.2 of the textbook prove the following equivalences. In writing each truth table, you can can use either the standard format used in Example 2.22 of the book or the more compact one in Example 2.23 on page 19. (a) AA(BVC) = (A/B) V (AAC) (b) AVB=-(-AA-B) (c) A B = (AVB) A (AV-B) (d) Als-A (e) A B = -(AA-B) easier to build a truth table by adding columns that show the truth value for subformulas of A. Example 2.22 Here is a truth table for the formula (pq)+(-9-p) from Example 2.17: P 9 7 T F F T F F P-9 T F T T F F T -9-9--P(p9) + (-4-p) F T F T F T T 89 A convenient way of computing the