Translate the following inference to logic notation: For all x, x_7 is an artist or x_7 will drive a car. For all x, if x_7 were an artist, then x_7 is playing tennis. For all x, x_7 is a doctor. For all x, x_7 will drive a car if and only if x_7 will play tennis. Therefore for all x, x_7 is a doctor and x_7 will play tennis.
forall x: P(x) or Q(x). forall x: P(x) -> R(x). forall x: S(x). forall x: Q(x) <-> R(x). Therefore forall x: S(x) and R(x).