And we're done. Now if you want to get a little bit more of a visual understanding of this, and what I'm about to do, you would not actually have to do on the actual exam. Well let's just try to graph, let's graph these points here. Let me give myself some space to do it. So if we were, if we tried to graph it, so I'll just do a very rough graph here. So let's say this is Y is equal to V of T, and we see that V of T goes as low as negative 220, goes as high as 240. So let me give, so I want to draw the horizontal axis someplace around here.