Question: Find the closest point to b = (1, 2, - 1,3)T in the subspace W = span {(1,0,2, l)T, (1, 1,0, l)T, (2, 0, 1,

Find the closest point to b = (1, 2, - 1,3)T in the subspace W = span {(1,0,2, l)T, (1, 1,0, l)T, (2, 0, 1, - 1)T} by first constructing an orthogonal basis of W and then applying the orthogonal projection formula (5.64).

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