Question: 3. (4 points) Using the logical equivalences proven in class show that (pva)(pvr)) - (q vr) is a tautology (is always true). 4. (4 points)

3. (4 points) Using the logical equivalences proven in class show that (pva)(pvr)) - (q vr) is a tautology (is always true). 4. (4 points) Show using set definitions and logical equivalences that P\Q=Pno. 5. (4 points) Show using set equivalences that ( PQ) U (POR)U(QAR) = (PUQN(PU R) n (QUR)

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