5. Suppose the domain of the propositional function P(,y) consists of pairs z and y, where = 1, 2, or 3, and y = 1, 2, or 3, write out the propositions below using disjunctions and conjunctions only. (a) 3r P(r,3) (b) Vy -P(2,y) (c) Vr 3y P(,y) d) 3r Vy -P(x,y)