Translate the following inference to logic notation: For all x, if x_6 plays squash, then x_6 is working. For all x, x_6 will play squash. For all x, if x_6 works, then x is an artist. Therefore there is at least one x for which x is an artist.
forall x: P(x) -> Q(x). forall x: P(x). forall x: Q(x) -> R(x). Therefore exists x: R(x).