So first let's find the total area under the density curve. And the density only has area, the density curve only has area from x equals one to x equals three. So it does amount to finding the area of this larger trapezoid. So let me highlight this trapezoid in red. So we wanna find the area of this trapezoid right over here. And then that should be equal to one because all density curves have an area of one under the total curve. So let's first verify that.