This is her solution. So step one, it looks like she tried to take the derivative. Step two, she tries to find the solution, find where the derivative is equal to zero, and she found that it happens at x equals two, so she says that's a critical point. And step three, she says she makes a conclusion that therefore h has a relative extremum there. Is Pamela's work correct? If not, what's her mistake? So pause this video and try to work through it yourself and see if Pamela's work is correct.