Do they give that to us? Well, let's see. They say at a certain time, at a certain instant, t sub zero, the base, I'm gonna underline this in a different color, the base at a certain instant, t sub zero, the base is five meters. So they say the base at time t sub zero, the base is a function of time, but they tell us that it is five meters. So this is five meters right over here. Now what about the rate of change of the base with respect to time? Do they tell us that?