And then plus, finally, because we stop right over here at n equals four. When n equals four, it's going to be k over four plus one. That's when n is equal to four. 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.