Minus 2 times mu times the sum from i is equal to 1 to n of x i, and then what is this? What is another way to write this, right? Essentially we're going to add 1 to itself n times, right? This is kind of saying just look, whatever you have here, just iterate through it n times. If you had an x sub i here, you would use the first x term and then the second x term. When you have a 1 here, this is just essentially saying add 1 to itself n times, right? Which is the same thing as n. So this is going to be plus mu squared times n. All right.