Translate the following inference to logic notation: For all x, x_10 will not climb a mountain. For all x, if x_10 plays squash, then x_10 is drinking water. There is at least one x for which x_10 will drink water if and only if x_10 will play squash. For all x, if x_10 plays squash, then x_10 is climbing a mountain. Therefore there is at least one x for which x_10 will not drink water.
forall x: ~P(x). forall x: Q(x) -> R(x). exists x: R(x) <-> Q(x). forall x: Q(x) -> P(x). Therefore exists x: ~R(x).