And so this also would be a point of inflection. But for this, our g of x is kind of hard to visualize the way they've defined it right over here. So the best way to think about it is just figure out where its second derivative has a sign change. And to think about that, we have to find its second derivative. So let's write g of x over here. We know g of x is equal to two x plus the definite integral from zero to x of f of t dt. We've already taken its derivative, but we'll do it again.