So let's do that. Let's take the derivative of this twice. And before we do it, let me just even rewrite this so it's going to be a little bit easier to differentiate it. So if we just take each of these two terms of the numerator and divide them by t squared, we're going to get t to the third divided by t squared is just t, and then two divided by t squared, we could write that as plus two t to the negative two power. And now let's take the derivative. So the velocity function, the velocity as a function of time, just the derivative of this with respect to time. So it's going to be derivative of t with respect to t is one.