And the values that we could look at, or the points, are our critical points. And critical points are where g prime is either zero or it is undefined. So let's think about it. Where is g prime of x equal to zero? G prime of x is equal to zero when, let's just take g prime of x. We're gonna leverage the power rule right here. Four x to the third power, four x to the third minus five x to the fourth, minus five x to the fourth is equal to zero.