Translate the following inference to logic notation: For all x, x_6 will play squash or x_6 will not read a book. For all x, x_6 will not cook. For all x, x_6 will play squash if and only if x_6 will cook. Therefore for all x, x_6 will not read a book.
forall x: P(x) or ~Q(x). forall x: ~R(x). forall x: P(x) <-> R(x). Therefore forall x: ~Q(x).