Now, we've got a 1. And what's the distance between 1 and the mean? It's 1 minus our mean, which is going to be p over here. And we're going to want to square this as well. This right here is going to be the variance. Now, let's actually work this out. So this is going to be equal to 1 minus p. Now, 0 minus p is going to be negative p. If you square it, you're just going to get p squared.