Translate the following inference to logic notation: For all x, if x_6 were sad, then x_6 is climbing a mountain. There is at least one x for which if x_6 climbs a mountain, then x_6 is a bartender. For all x, x_6 is sad and x_6 will drive a car. Therefore there is at least one x for which x_6 is a bartender.
forall x: P(x) -> Q(x). exists x: Q(x) -> R(x). forall x: P(x) and S(x). Therefore exists x: R(x).