Let A = 2 1 29 2 36 and let W= COICA). Find on orthonormal basis for W. . Find a basis of W. Set up (but do not solve) a matrix equation to find the parabola yax² + bx + C that best fits the data {(1,2), (-1,3), (4,1), (5,2), (7-3) { in the least-squares sense. Do not multiply out, invert, or row-reduce any matrices.

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