Note: You must only complete the statements below. You cannot change the existing statement nor add an additional statement. X∗=(ATA)−1ATB is used to determine the coefficients of our quadratic model using least squares approximation. We will use the points (2, 3), (4, 5) and (6, 7). (a) The values in the last line of matrix A will be: _______ (b) The values in the first column of AT will be: _____ (c) The order of the matrix X* is _____