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