Translate the following inference to logic notation: For all x, if y_3 were a musician, then y_3 is driving a car. For all x, y_3 is a musician. For all x, if y_3 drives a car, then y_3 is working. For all x, if y_3 works, then y_3 is a sailor. Therefore for all x, y_3 is a sailor.
forall x: P(x) -> Q(x). forall x: P(x). forall x: Q(x) -> R(x). forall x: R(x) -> S(x). Therefore forall x: S(x).