Translate the following inference to logic notation: There is at least one x for which x_4 will play squash. For all x, x_4 is an electrician or x_4 is an artist. For all x, if x_4 were an artist, then x_4 is excited. For all x, if x_4 were an electrician, then x_4 is excited. Therefore there is at least one x for which x_4 will play squash and x_4 is excited.
exists x: P(x). forall x: Q(x) or R(x). forall x: R(x) -> S(x). forall x: Q(x) -> S(x). Therefore exists x: P(x) and S(x).