Translate the following inference to logic notation: For all x, if x_13 listens to a song, then x_13 is a server. For all x, if x_13 were an electrician, then x_13 is a server. For all x, x_13 will listen to a song or x_13 is an electrician. There is at least one x for which x_13 is a taxi driver and x_13 is fast. Therefore there is at least one x for which x_13 is a server and x_13 is a taxi driver.
forall x: P(x) -> Q(x). forall x: R(x) -> Q(x). forall x: P(x) or R(x). exists x: S(x) and T(x). Therefore exists x: Q(x) and S(x).