2 plus 5 is easy. That's 7. 3 plus 7 is 10. And then we have 0.25 plus 0.25. So it's going to be 10.5 plus 7 is 17.5. So 1 half times 17.5, which is equal to 8.75, which once again gives us an approximation. Clearly, the way I've drawn it right over here for the function we're using, it's going to be an underestimate because we've given up all of that pink area that I had colored in before.