I tagged this question as homework, and the user replied that it wasn't homework, but a practice problem for exam review. In my view, exactly the same question could be asked as homework and exam review, and the purpose of the questions is exactly the same (i.e. teaching). Hence, I think the homework tag should pull double-duty here. Do you agree?
Yes (I agree) ;-P
The reason why is pretty much what you put in your comment on the linked question:
Basically, I would say that
(However, I don't think this applies to the specific question you identified, for reasons explained in my comment on that question.)