Determine whether each argument is valid. If the argument is valid, give a proof using the laws of logic. If the argument is invalid, give values for the predicates P and Q over the domain(ab) that demonstrate the argument is invalid. 3x (P) A0) 3x Q(x) 3x p(x) 3x (P(x) ^ Q(x)) (b) VX (P(x) A 0(x)) 0(x) ^ P(x) x (P) vo)