What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z_4: T(z_4) -> T_3(z_4). forall z_4: T(z_4) -> S(z_4). forall z_4: T_3(z_4) -> S(z_4). exists z_4: S(z_4) -> T(z_4).
forall z_4: T(z_4) -> S(z_4). exists z_4: S(z_4) -> T_3(z_4). exists z_4: T_3(z_4) -> T(z_4). exists z_4: S(z_4) <-> T(z_4). exists z_4: T(z_4) <-> S(z_4).