Translate the following inference to logic notation: For all x, if x_9 were a soldier, then x_9 is an electrician. For all x, if x_9 were an electrician, then x_9 is a soldier. For all x, if x_9 drinks water, then x_9 is writing a letter. For all x, if x_9 writes a letter, then x_9 is an electrician. For all x, x_9 is not a soldier. Therefore for all x, x_9 will not drink water.
forall x: P(x) -> Q(x). forall x: Q(x) -> P(x). forall x: R(x) -> S(x). forall x: S(x) -> Q(x). forall x: ~P(x). Therefore forall x: ~R(x).