A slope of zero, that would be right over here at the bottom where right at that moment, as we change x, y is not increasing or decreasing. The slope of the tangent line right at that bottom point would have a slope of zero. So I feel really good about that response. Let's do one more of these. All right, so they're telling us to compare the derivative of g at four to the derivative of g at six. And which one of these is greater? And like always, pause the video and see if you could figure this out.