Let me do that in a color that contrasts a little bit better. The next trapezoid will go from 2 to 5. And then the third trapezoid goes from 5 to 9. And then the fourth trapezoid goes from 9 to 10. So if I want to approximate the definite integral part right here, before we divide by 10, I just need to find the area of these 4 trapezoids. So let's do that. The area of this first trapezoid is going to be the base, which is 2, times the average height.