Refer to the following theorem: If A is an mxn matrix with linearly independent columns, then A can be factored as A = QR, where Q is an mxn matrix whose columns form an orthonormal basis for Col A and R is an nxn upper triangular invertible matrix with positive entries on its diagonal. Given A = QR, describe how to find an orthogonal mxm (square) matrix Q₁ such that A = Q₁ R [8] 0

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