coed in matlab

2. Write a function to evaluate the value of a function at an xi function val = newton InterEval(x, y, xi) Input: X: [x0, x1, x2, ..., xn] y: [yo, yl, y2, ..., yn] xi: value to be evaluated at Output: val= value of function at xi Hint: For a 3rd degree polynomial , rewrite the polynomial as a0 + (x - x0)(a1 + (x -x1)(a2 + (x - 2)a3))