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