Translate the following inference to logic notation: For all x, x_7 is a musician if and only if x_7 will drive a car. For all x, if x_7 were poor, then x_7 is fast. For all x, if x_7 were fast, then x_7 is a musician. Therefore for all x, if x_7 were poor, then x_7 is driving a car.
forall x: P(x) <-> Q(x). forall x: R(x) -> S(x). forall x: S(x) -> P(x). Therefore forall x: R(x) -> Q(x).