So there's some slope right over there. And then we can use to approximate, we can use this slope to kind of create a linear approximation of where we're gonna be a quarter of a year from then. So if you go, so although we don't know what W is just yet, we could take the slope of this line out to T is equal to, so this is our T axis, to T is equal to 1 4th, and wherever that line takes us out after a fourth of year, that will be at least a decent approximation. We're extrapolating forward from that first point and the current slope. So we really just have to figure out the slope of this line and just see where that line is at T is equal to 1 4th. And you say, wait, how do we know, how do we know what the derivative of W is at zero without knowing W? And that's where we can go straight to this differential equation.