5. (2 pts. each) Construct a truth table for each of these compound propositions. (a) p - -p (b) pe (pv q) ( c ) (q - -p ) + ( p+ q ) (d) (pv q) AT (e) (p - q) A (-p -r) 6. (3 pts. ) Is the conditional statement [p A (p - q)] - q a tautology? Support your answer with a truth tab 7. (5 pts. ) Show that (p -+ q) V (p - r) and p - (q Vr) are logically equivalent