So when you go to the cumulative distribution function, you get that right there. That tells the probability that you are, let me get, I keep scrolling back and forth. Let me, that tells you that you're the, so when you go to 5, and you just go right over here, this essentially tells you this area under the curve. The probability that you're less than or equal to 5, everything up there. And then when you evaluate it at minus 15 down here, it tells you the probability that you're down back here. So when you subtract this from the larger thing, you're just left with what's under the curve right there. And just to understand this spreadsheet a little bit better, just because I really want you to play with it and move the, see what happens when, if I make this distribution, the mean was minus 5, now let me make it 5.