So it's going to be 16 over 3. Did I get that right? 4 plus 12, yep, 16 over 3. And then the last one we have to calculate is the mean of the x squareds. So what's the mean of the x squareds? The first x squared is just going to be 1 squared, this 1 squared right over here, plus this 2 squared, plus 2 squared right over here, plus this 4 squared, plus this 4 squared. And we have 3 data points again.