What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z_2: W(z_2) and Q_2(z_2). forall z_2: R_2(z_2) -> W(z_2). exists z_2: W(z_2) -> R_2(z_2).
forall z_2: W(z_2). forall z_2: Q_2(z_2). exists z_2: W(z_2) <-> R_2(z_2). exists z_2: R_2(z_2) <-> W(z_2).