Translate the following inference to logic notation: For all x, x_8 will not play squash or x_8 is happy. For all x, x_8 will not sleep or x_8 will drive a car. For all x, x_8 will sleep or x_8 will play squash. For all x, x_8 will not drive a car. Therefore David is happy.
forall x: ~P(x) or Q(x). forall x: ~R(x) or S(x). forall x: R(x) or P(x). forall x: ~S(x). Therefore Q(a).