So it's going to be equal to 1 half. So for example, this first interval between the boundary between the first rectangle and the second is going to be 1.5. Then we go 1 half to 2. Then we go to 2.5. And then we go 1 half to 3. Now let's think about how we'll define the height of the rectangles. For the sake of this video, we'll see in future videos that there's other ways of doing this, I'm going to use the left boundary of the rectangle to define the height, or the function, I should say.