Translate the following inference to logic notation: For all x, x_7 is not a bartender. For all x, x_7 is a bartender if and only if x_7 will play squash. For all x, x_7 is a soldier if and only if x_7 will drive a car. For all x, if x_7 were a soldier, then x_7 is playing squash. Therefore for all x, x_7 will not drive a car.
forall x: ~P(x). forall x: P(x) <-> Q(x). forall x: R(x) <-> S(x). forall x: R(x) -> Q(x). Therefore forall x: ~S(x).