So let's see. Let's get an approximate value for what that is. So if we take 9 halves, 9 divided by 2, I guess we could call that 4.5. And we want to raise it to the 1 third power. We get 1.65. So it's approximately equal to 1.65 as our critical point. Now the way the problem is asked, we're only getting one legitimate critical point here.