Translate the following inference to logic notation: For all x, x_3 is a taxi driver or x_3 will work. For all x, if x_3 were a taxi driver, then x_3 is playing tennis. For all x, x_3 will read a book. For all x, x_3 will play tennis if and only if x_3 will work. Therefore for all x, x_3 will play tennis and x_3 will read a book.
forall x: P(x) or Q(x). forall x: P(x) -> R(x). forall x: S(x). forall x: R(x) <-> Q(x). Therefore forall x: R(x) and S(x).