What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x: P_2(x). forall x: U_2(x). forall x: S_4(x) and Q(x).
forall x: S_4(x). forall x: Q(x). exists x: P_2(x) and U_2(x). exists x: U_2(x) and P_2(x).