Translate the following inference to logic notation: For all x, if x_4 takes a plane, then x_4 is a sailor. For all x, if x_4 were an artist, then x_4 is taking a plane. For all x, if x_4 were a sailor, then x_4 is an artist. Therefore if Michael were a sailor, then Michael is taking a plane.
forall x: P(x) -> Q(x). forall x: R(x) -> P(x). forall x: Q(x) -> R(x). Therefore Q(a) -> P(a).