solve this problem, with steps and give the detailed explanation

1. Given a set of four data points D D = { (-2, -3); (0, -8); (2, 1); (3, 9) } Fit the following 2nd -order polynomial, f (x) = a + Bx + 2x to the given data set D, assuming non- uniform weighting w = {1; 5; 1; 1}