There are m minus 1 degrees of freedom. But with that said, well, in this case, m is 3. So we could say there's 2 degrees of freedom for this exact example. But actually, let's calculate the sum of squares between. So what is this going to be? This is going to be equal to, I'll just scroll down, running out of space. This is going to be equal to, this right here is 2 minus 4 is negative 2 squared is 4.