Translate the following inference to logic notation: There is at least one x for which if z_1 were a police officer, then z_1 is a musician. For all x, if z_1 plays squash, then z_1 is a musician. For all x, z_1 will play squash or z_1 is a police officer. For all x, if z_1 were a musician, then z_1 is playing squash. Therefore there is at least one x for which z_1 is a musician.
exists x: P(x) -> Q(x). forall x: R(x) -> Q(x). forall x: R(x) or P(x). forall x: Q(x) -> R(x). Therefore exists x: Q(x).