Question: 2 1 Let A 11 and b = 2 1 3 -9. The QR factorization of the matrix A is given by: 0 2

2 1 Let A 11 and b = 2 1 3 -9.

2 1 Let A 11 and b = 2 1 3 -9. The QR factorization of the matrix A is given by: 0 2 2 3 1 1 1 = 3 2 2 2 1 0 (a) Applying the QR factorization to solving the least squares problem Ax = b gives the system: 3 513 x= 0 2 (b) Use backsubstitution to solve the system in part (a) and find the least squares solution.

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