Solving least squares problem

This is a project that explores different methods for fitting a polynomial by solving least square method

Write down the normal equation and use appropriate MATLAB commands to solve it.

Code the classical Gram-Schmidt method and apply it to find QR decomposition and then find the solution

of interpolation problem.

Use MATLAB function qr to obtain QR decomposition and use it to find the solution of interpolation

problem.

Use MATLAB function svd to construct pseudoinverse of A and use it to find the solution of interpolation

problem.