prove if its tautology

d) IV) A(-1)(-1) -- (PAV) Vyvr by De Morgan's law IF v (pv) - by negation law Ip v) A vg) v (pv) distributive law - by Io v a) A(-1)^(-1)) -- by associative law IT v ():)) -- by negation law (PA) VF by negation law (PA ) (Y ) by associative law IpQ)A( Q))) - by logical equivalence Io v g) (pv)) ((ov) Al- by distributive law (pv) ) -- by identity law T by domination law (pv) AI) vr by logical equivalence [pvg) Apva) -1)]-by logical equivalence (PA ) T by negation law Ilp va) Al-I) A(-01- Reset