It would be three times four, which would be 12 times x minus two to the second power times the derivative of x minus two, which is just one, which is exactly what she has here, 12 times x minus two to the second power. That checks out. So step one's looking good for Olga. Step two, the solution of the second derivative equaling zero is x equals two. That looks right. The second derivative is 12 times x minus two squared and we wanna make that equal to zero. This is only going to be true when x is equal to two.