Well, x is equal to plus or minus one. These are also critical points because they make f prime of x undefined. So I'm not feeling good about step two. It is true that a critical point is x equals zero, but it is not the only critical point. So I would put that there. And the reason why it's important, you know, you might say, well, what's the harm in not noticing these other critical points? She identified one, maybe this is the relative maximum point.