| E New tab score game a1.pdf O f O file:///Cyu Ostuff/a1.pdf 012 | 1. For each of the following statements use a truth table to determine whether it is a tautology, a contradiction, or a contingency (a) ((pvT)A())(pvr) 2. For each of the following logical equivalences state whether it is valid or invalid. If invalid then give a counterexample (e.g., based on a truth assignment). If valid then give an algebraic proof using logical equivalences from Tables 6, 7, and 8 from Section 1.3 of textbook (b) (p q) v (p-r): (pv q) r O Type here to search US 2018-09-16 3