Translate the following inference to logic notation: There is at least one x for which x_6 is sad. For all x, x_6 is a nurse. For all x, x_6 will make tea or x_6 is not a nurse. Therefore there is at least one x for which x_6 will make tea and x_6 is sad.
exists x: P(x). forall x: Q(x). forall x: R(x) or ~Q(x). Therefore exists x: R(x) and P(x).