So one is our upper bound of f of t dt. And what is that equal to? Well, that's going to be the area under the curve and above the t-axis between t equals negative two and t is equal to one. So it's gonna be this area here. And since it's on a grid, we can actually figure this out. We can actually break this up into two sections. This rectangular section is three wide and five high, so it has an area of 15 square units.