So let's see, let me plot one here, and then two here. And so we have a critical point at one over the square root of e. Let me put it right over there. One over the square root of e. And we know that we're only defined from, for all x is greater than zero. So let's think about the interval between zero and this critical point, right over here. So the open interval from zero to one over the square root of e. Let's think about whether g prime is positive or negative there. And then let's think about it for, for x greater than one over the square root of e. So that's the interval from one over the square root of e to infinity. So over that yellow interval, well let's just try out a value that is in there.