What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_2: P_2(x_2) -> U(x_2). forall x_2: Q(x_2). forall x_2: P_2(x_2).
exists x_2: U(x_2). forall x_2: Q(x_2) and P_2(x_2). forall x_2: P_2(x_2) and Q(x_2).