Neville's Algorithm is used to approximate f (0) using f (2), f (1), f (1), and f

Question:

Neville's Algorithm is used to approximate f (0) using f (−2), f (−1), f (1), and f (2). Suppose f (−1) was understated by 2 and f (1) was overstated by 3. Determine the error in the original calculation of the value of the interpolating polynomial to approximate f (0).