What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists z: W(z) -> R_2(z). forall z: W_2(z) or ~Q(z). forall z: Q(z) or W(z). forall z: R_2(z) -> W_2(z).
exists z: W(z) -> W_2(z). forall z: Q(z) -> W_2(z).