Yeah, I still have the work right up here. The mean of the difference is going to be the difference of the means. The mean of the difference is the same thing as the difference of the means. So the mean of this new distribution right over here is going to be the same thing as it's going to be the mean of our sample mean minus the mean of our sample mean of y. And this might seem a little abstract in this video. In the next video, we're actually going to do this with concrete numbers. And hopefully, it'll make a little bit more sense.