Question 3 (15 marks). Use truth tables to show the following: (a) Is -p V (p q) a tautology, a c...

Question 3 (15 marks). Use truth tables to show the following: (a) Is -p V (p q) a tautology, a contradiction or neither? (b) Is ((p +9) V (p +r)) + (p + (q V r)) a tautology, a contradiction or neither? (c) Are -(p1q) and q + p logically equivalent?