What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: Q_4(z) -> R(z). forall z: Q_4(z) <-> R(z). forall z: Q_4(z) -> W_3(z). forall z: W_3(z) -> R(z).
forall z: Q_4(z) -> R(z). forall z: Q_4(z) -> R(z). forall z: R(z) -> Q_4(z).