Take m=50, n=12 . Using MathAB's linspace, define t to be the m -vector corresponding to linearly spaced grid points from 0 to 1 . Using MATLAB's vander and fliplr, define A to be the m × n matrix associated with least squares fitting on this grid by a polynomial of degree n-1 . Take b to be the function cos (4 t) evaluated on the grid. Now, calculate and print (to sixteen-digit precision ) the least squares coefficient vector x by six methods:(a) Formation and solution of the normal equations,

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