Translate the following inference to logic notation: For all x, if x_6 drives a car, then x_6 is drinking water. There is at least one x for which x_6 is a musician if and only if x_6 will drink water. For all x, x_6 is a musician. Therefore there is at least one x for which x_6 will drink water.
forall x: P(x) -> Q(x). exists x: R(x) <-> Q(x). forall x: R(x). Therefore exists x: Q(x).