Translate the following inference to logic notation: For all x, if x_4 were a police officer, then x_4 is an electrician. For all x, x_4 is a politician or x_4 is not rich. For all x, if x_4 were a politician, then x_4 is a police officer. Therefore for all x, if x_4 were rich, then x_4 is an electrician.
forall x: P(x) -> Q(x). forall x: R(x) or ~S(x). forall x: R(x) -> P(x). Therefore forall x: S(x) -> Q(x).