What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: P_1(z) -> T_1(z). forall z: P_1(z) -> Q_3(z). exists z: T_1(z) -> P_1(z).
exists z: T_1(z) -> Q_3(z). exists z: T_1(z) <-> P_1(z). exists z: P_1(z) <-> T_1(z).