And this right over here looks like delta x times i. So it looks like our delta x is equal to five over n. So what can we tell so far? Well, we could say that, okay, this thing up here, the original thing, is going to be equal to the definite integral. We know our lower bound is going from two to, we haven't figured out our upper bound yet. We haven't figured out our b yet. But our function is the natural log of x, and then I will just write a dx here. So in order to complete writing this definite integral, I need to be able to write the upper bound.