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