Translate the following inference to logic notation: For all x, x_9 is a scientist and x_9 will cook. For all x, if x_9 were a bartender, then x_9 is taking a plane. For all x, if x_9 were a scientist, then x_9 is a bartender. Therefore Robert is taking a plane.
forall x: P(x) and Q(x). forall x: R(x) -> S(x). forall x: P(x) -> R(x). Therefore S(a).