Consider the following premises. If Barbara listens to a song, then it is not raining. For all y_1, y_1 is a bartender. It is raining. Can we infer the following from them? If we can, name the inference rule being used: Barbara is not listening to a song.
 From the fact that for all y_1, y_1 is a bartender we can infer that Charles is a bartender via universal instantiation. Finally, from the fact that if Barbara listens to a song, then it is not raining, and that it is raining we can infer that Barbara is not listening to a song via modus tollens. Therefore, the answer is yes.