is possible. Your proofs must be in proper form to receive credit. Read the (1) (5 pts) Is p (an r) the negation of (pAT) V (pAT) ? Justify your (2) (5 pts) Is (p q) r logically equivalent to (p V r) (ayr)? Prove relevant material from the textbook before you attempt the problems answer. your answer. (3) (15 pts) Consider the following arguments. If an argument is valid, then present a proof sequence; otherwise, prove that the argument is invalid You are forbidden to use truth tables to justify your answers (but, you may use them otherwise) (3a) ((png) r) ((p r) ^ (q r)) (b) ((q r) (p (q V r))) (p r)