This function apply Test to identify where are the solution located. We have mainly 3 situations for k > 2 and 2 for k = 2. For k > 2 we have: DN2 = No estimators in the boundary. DN1 = Some estimator in the boundary and global agreement imaginary. DN0 = Any other case For k = 2 we have: DA0 = Some estimator in the boundary. DA1 = Any other case