Translate the following inference to logic notation: There is at least one x for which x_10 will read a book if and only if x_10 is a musician. For all x, x_10 will not play squash. For all x, if x_10 reads a book, then x_10 is playing squash. Therefore there is at least one x for which x_10 is not a musician.
exists x: P(x) <-> Q(x). forall x: ~R(x). forall x: P(x) -> R(x). Therefore exists x: ~Q(x).