It's eight. So we're gonna use that as the height of this first rectangle that's approximating the area for this part of the curve. Similarly, for this second one, since we're using a right Riemann sum, we use the value of the function at the right boundary, the right boundary seven. So the value of the function is three. So this would be our second rectangle, our second division, I guess, used to approximate the area. And then last but not least, we would use the right boundary of this third subdivision when x equals 10, f of 10 is five. So just like that.