So this is all going to be equal. I'll just write it over here. This is equal to k over two plus k over three plus k over four plus k over five, which is exactly this choice right over here. And actually, if I had looked at the choices ahead of time, I might have even been able to save even more time by just saying, well, look, actually, if you just try to compute the first term, when n is equal to one, it would be k over two. Well, only this one is starting with a k over two. This one has no k's here, which is sketchy. They're trying to look at the error where you try to replace the k with the number as well, not just the n. So that's what they're trying to do here.