I said I wouldn't use a graphing calculator, but I could use a regular calculator. 27, if I were to take the natural log of that, it's like 3 point, well for our purpose this is called 3.3, we're just trying to get the general shape of the graph. So 3.3, 3 point, well we could just say 2.9 and it kept going. So this is a critical point right here, the slope is 0 here. Slope is equal to 0 at x is equal to 0. So this is one thing we want to block off. And let's see if we can find any candidate inflection points.