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3. Proof using propositional logic properties Using propositional logic properties statements: and other logical equivalences not truth tables), prove the following 1. (pVq) V (pV

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3. Proof using propositional logic properties Using propositional logic properties statements: and other logical equivalences not truth tables), prove the following 1. (pVq) V (pV -q) is a tautology 2. ((p r) (q r) (pv q)) r is a tautology, 3. (pVq) (- -y) is a contradiction 4. (q q 8 r) p is a contradiction

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