Let A = 3 2 and b = 2 -5 7√2 6 1 3 2 = 7 7√2 28 3 7√2 14 [7 8 2022] The QR factorization of the matrix A is given by: (a) Applying the QR factorization to solving the least squares problem Ax = b gives the system: (use exact values) 2 (3-8 X = √2 (b) Use backsubstitution to solve the system in part (a) and find the least squares solution. 48

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