What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists y: T_1(y). forall y: P(y) -> R_4(y). forall y: P(y).
forall y: R_4(y). exists y: T_1(y) and P(y). exists y: P(y) and T_1(y).