Question: Question #2: 2. Let 4 2 A = 21 -1 4 and b = 4 2 1 2 5 a. (4 pts) Compute b, the

Question #2:

2. Let 4 2 A = 21 -1 4 and b = 4 2 1 2 5 a. (4 pts) Compute b, the orthogonal projection of b onto Col(A). b. (4 pts) Solve the linear system, Ax = b. c. (4 pts) Explain why the solution (x) found in (b) is the least-squares solution to Ax = b. What is the least-squares error

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