Its right endpoint is zero. Zero squared plus one is one. So height of one, width of one has an area of one. Second rectangle here, it has a height of, we look at our right endpoint, one squared plus one is two times our width of one. Well, that's just gonna give us two. And then here, our right endpoint is two squared plus one is five times our width of one gives us five. So in this case, we get, when we look at our right endpoints of our intervals, we get one plus two plus five is equal to eight.