Translate the following inference to logic notation: For all x, if y_1 were a cashier, then y_1 is a janitor. For all x, y_1 is a cashier or y_1 is not a janitor. Therefore for all x, if y_1 were a cashier, then y_1 is a janitor.
forall x: P(x) -> Q(x). forall x: P(x) or ~Q(x). Therefore forall x: P(x) -> Q(x).