So we're talking about during the fourth minute. So we definitely wanna take the integral of the rate function. And we just have to think about the bounds and all of the choices here taking the integral of the rate function. So really the interesting part is during the fourth minute. So let me just draw a little number line here and we can think about what the fourth minute looks like. Or actually, let me just draw the whole thing. So let's say this is r of t right over there.