Translate the following inference to logic notation: For all x, x_11 will drink water. For all x, x_11 will read a book. There is at least one x for which x_11 will write a letter. Therefore there is at least one x for which x_11 will read a book and x_11 will drink water.
forall x: P(x). forall x: Q(x). exists x: R(x). Therefore exists x: Q(x) and P(x).