Translate the following inference to logic notation: For all x, if x_4 plays tennis, then x_4 is a police officer. For all x, if x_4 were curious, then x_4 is playing tennis. For all x, if x_4 were a police officer, then x_4 is curious. Therefore if Charles plays tennis, then Charles is a police officer.
forall x: P(x) -> Q(x). forall x: R(x) -> P(x). forall x: Q(x) -> R(x). Therefore P(a) -> Q(a).