And I'll show you how I calculated this in a second. So let me get the screen drawn to a log. So what did I just do? This, between minus 1 and 1, and I'll show you behind the scenes what Excel is doing. We're going from minus 1, which is roughly right here, to 1, and we're calculating the area under the curve. We're calculating this area. Or for those of you who know calculus, we're calculating the integral from minus 1 to 1 of this function, where the standard deviation is right here, is 10, and the mean is minus 5.