Question: 3. (a) Using equivalence transformations, prove that ((pv qMp s) (q-t)) (s V t) T transformation type per line (b) Prove that (((pVq)n(p s) (q

3. (a) Using equivalence transformations, prove that ((pv qMp s) (q-t)) (s V t) T transformation type per line (b) Prove that (((pVq)n(p s) (q t)) -+ sv t) is a tautology, using a direct proof (with cases) (c) Prove that (((pv q) (p s) (q t)) -+ s v t) is a tautology by proving the contrapositive
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