What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists z_3: Q(z_3). forall z_3: P_4(z_3). forall z_3: Q_4(z_3) or ~P_4(z_3).
exists z_3: Q(z_3) and P_4(z_3). exists z_3: P_4(z_3) and Q(z_3). forall z_3: P_4(z_3) -> Q_4(z_3).