Translate the following inference to logic notation: For all x, x_4 is a musician. For all x, x_4 is rich. There is at least one x for which if x_4 were a musician, then x_4 is playing squash. Therefore there is at least one x for which x_4 is rich.
forall x: P(x). forall x: Q(x). exists x: P(x) -> R(x). Therefore exists x: Q(x).