And so let's see what she does in step three right over here. Well, it is indeed in step three that she's testing, she's trying to test values on either side of the critical point that she, that the one critical point that she identified. But the problem here, the reason why this is a little shady is this is beyond another critical point that is less than zero, and this is beyond, this is greater than another critical point that is greater than zero. This is larger than the critical point one, and this is less than the critical point negative one. What she should have tried is x equals 0.5 and x equals negative 0.5. So this is what she should have done, is try maybe negative two, negative one, negative 1.5, zero, 1.5, and then one we know is undefined, and then positive two. Because this is a candidate extremum, this is a candidate extremum, and this is a candidate extremum right over here.