Translate the following inference to logic notation: For all x, x_18 will read a book if and only if x_18 is happy. For all x, if x_18 plays a game, then x_18 is happy. For all x, x_18 will read a book. Therefore Mary is happy or Jessica is running.
forall x: P(x) <-> Q(x). forall x: R(x) -> Q(x). forall x: P(x). Therefore Q(a) or p.