Translate the following inference to logic notation: For all x, if z were a taxi driver, then z is an office clerk. For all x, if z were an office clerk, then z is playing tennis. For all x, z will not play tennis. For all x, z is a taxi driver or z is not an office clerk. Therefore for all x, z is not a taxi driver.
forall x: P(x) -> Q(x). forall x: Q(x) -> R(x). forall x: ~R(x). forall x: P(x) or ~Q(x). Therefore forall x: ~P(x).