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For each of the following linear systems, find the QR factorization of the coefficient 12 -1 3 matrix, and then use your factorization to

For each of the following linear systems, find the QR factorization of the coefficient 12 -1 3 matrix, and then use your factorization to solve the system: (i) (- 1 ) ( 5 ) = ( 2 ), (ii) 212 1-1 0 2-1 2 3 X y = 2 Y (iii) (1190-0 =

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