It's just rounding to 100%. It's probably 99.999999% or something like that. And so to actually calculate this, what I do is I take the cumulative distribution function of this point, and I subtract from that the cumulative distribution function of that point. And that's where I got this 100% from. Anyway, hopefully that'll give you a good feel for the normal distribution. And I really encourage you to play with the spreadsheet and to even make a spreadsheet like this yourself. And in future exercises, we'll actually use this type of spreadsheet as an input into other models.