help!!!

8 The nailve Gauss elimination method is: a. good for when the determinant of the system is zero b. difficult to use for linear equations c never convergent d. faster than Gauss elimination with scaled partial pivoting The Lagrange form of the interpolating polynomial is:: a. always faster to compute than the Newton form b. less useful for theorem proving c more useful when f' (x) is available d. easier to use when the f values might change 9