Translate the following inference to logic notation: There is at least one x for which x_16 is a cashier if and only if x_16 is poor. For all x, x_16 is a cashier or x_16 will climb a mountain. For all x, x_16 is not poor. Therefore there is at least one x for which x_16 will climb a mountain or x_16 is a sailor.
exists x: P(x) <-> Q(x). forall x: P(x) or R(x). forall x: ~Q(x). Therefore exists x: R(x) or S(x).