Divided by, we have 1, 2, 3, 4, 5 squared differences. So this is going to be equal to 8 minus 10 is negative 2 squared is positive 4. 9 minus 10 is negative 1 squared is positive 1. 10 minus 10 is 0 squared. You still get 0. 11 minus 10 is 1 squared. You get 1.