Translate the following inference to logic notation: For all x, x_8 will work or x_8 will write a letter. For all x, x_8 will not drive a car. For all x, x_8 will drive a car if and only if x_8 will work. Therefore for all x, x_8 will write a letter.
forall x: P(x) or Q(x). forall x: ~R(x). forall x: R(x) <-> P(x). Therefore forall x: Q(x).