What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z_3: U(z_3) -> S_1(z_3). exists z_3: S_1(z_3) -> Q_1(z_3). forall z_3: Q_1(z_3) <-> U(z_3).
exists z_3: U(z_3) -> Q_1(z_3). forall z_3: Q_1(z_3) -> U(z_3). forall z_3: U(z_3) -> Q_1(z_3).