Translate the following inference to logic notation: For all x, if x_6 plays squash, then x_6 is taking a plane. For all x, if x_6 takes a plane, then x_6 is playing a game. For all x, if x_6 plays a game, then x_6 is playing squash. For all x, if x_6 plays a game, then x_6 is working. For all x, x_6 will not work. Therefore for all x, x_6 will not take a plane.
forall x: P(x) -> Q(x). forall x: Q(x) -> R(x). forall x: R(x) -> P(x). forall x: R(x) -> S(x). forall x: ~S(x). Therefore forall x: ~Q(x).