What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: R_1(z) or ~Q_4(z). exists z: W_1(z) -> Q_4(z). forall z: R_1(z) -> W_1(z).
exists z: R_1(z) -> Q_4(z). forall z: Q_4(z) -> R_1(z).