The answer would be (The two ranges are close together, so there are probably no outliers in this set. )
The answer to your question is y=1
You can't change the sum by changing the grouping. Any way you cut it, you will always get 226, as you only have addition operations, and the commutative property [a+(b+c)=(a+b)+c] means that the sum will always be the same.
Using the Pythagorean theorem we can solve for the radius
see attached picture:
