Translate the following inference to logic notation: For all x, x_7 will drink water if and only if x_7 will sleep. For all x, x_7 will sleep if and only if x_7 will play tennis. For all x, x_7 will not drink water. Therefore for all x, x_7 will not play tennis.
forall x: P(x) <-> Q(x). forall x: Q(x) <-> R(x). forall x: ~P(x). Therefore forall x: ~R(x).