Plus the integral from zero to one. And what is our function when it's between zero and one? It's e to the negative four x. E to the negative four x, d x. And now we can do each of these integrals separately. And so this is going to be equal to, this is going to be equal to one half, and once again I'll do a big open bracket right over here. My pen is getting loose, let me tie on the front a little bit better. There you go.