And if it's undefined there, well, it's not going to be continuous or differentiable at that point. And so no, not continuous or differentiable or differentiable over the interval. Over the interval. All right, let's do the second part. Can we use the mean value theorem to say that there is a value c such that g prime of c is equal to negative 1 1 2 and one is less than c is less than two? If so, write a justification. So pause the video again.