Translate the following inference to logic notation: For all x, x_3 will not play squash. For all x, x_3 will read a book. For all x, if x_3 reads a book, then x_3 is playing squash. Therefore for all x, x_3 is a writer.
forall x: ~P(x). forall x: Q(x). forall x: Q(x) -> P(x). Therefore forall x: R(x).