Translate the following inference to logic notation: For all x, x_8 will climb a mountain if and only if x_8 will take a plane. For all x, x_8 will climb a mountain. For all x, x_8 will drive a car. Therefore for all x, x_8 will drive a car.
forall x: P(x) <-> Q(x). forall x: P(x). forall x: R(x). Therefore forall x: R(x).