Translate the following inference to logic notation: For all x, if x_5 were a taxi driver, then x_5 is a cashier. For all x, x_5 will write a letter. For all x, if x_5 were curious, then x_5 is a taxi driver. For all x, if x_5 writes a letter, then x_5 is curious. Therefore for all x, x_5 is a cashier.
forall x: P(x) -> Q(x). forall x: R(x). forall x: S(x) -> P(x). forall x: R(x) -> S(x). Therefore forall x: Q(x).