What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? P_9(a_5) -> W(a_5). forall x_9: P_9(x_9) <-> W(x_9).
forall x_9: P_9(x_9) -> W(x_9). forall x_9: W(x_9) -> P_9(x_9).