And let's see, four times negative 0.1, this all simplifies to negative 0.4. Now you add one to both sides, you get y is equal to, if you add one here, you're gonna get 0.6. So this, I didn't draw it quite to scale, 0.6 might be something closer to right around there. But there you go, that is our approximation for f of 1.9, which is choice B. And we're done. And one interesting thing to note is we didn't have to use all the information they gave us. We did not have to use this information about the second derivative in order to solve the problem.