Show that the argument form with premises (pAt) (r Vs), q (u t), u p, and s and conclusion q ris valid by using the rules of inference from Table 1 (Section 1.6). (Hint: Assume that the argument form with premises P1,P2, ,Pn and conclusion q r is valid if the argument form with premises pi,P2, ...Pnq, and conclusion r is valid.)