X zero to the fifth, cube root of that, that's gonna be zero but then you're dividing by zero. So g prime prime undefined when x is equal to zero. So therefore, x equals, so we could say, candidate, candidate, candidate inflection point when x equals zero. And so then we would want to test it. And we could set up a traditional table that you might have seen before where we have our interval or intervals. We could have test values in our intervals. We have to be careful with those, make sure that they are indicative.