Exercise 2. Describe mathematically what the following code does. Add comments to each line describing what each line accomplishes. Design a scenario where this code would be useful and write that scenario in R. (The scenario should not involve more than four lines of R code) OpSp = function(y, x) { n = length (y) s=n - 1 xs = sort (x) ci = rep(0, s) ssri = rep(0, s) for (i in 1:s) { ci [i] = (xs[i] + xs [i+1])/2 y1 = y [xci [i]] - mean( y [x>ci [i]] ) ssri [i] = sum( y1~2 ) + sum( y2-2 ) } return (ci [which . min (ssri) ]) 7