Let A = 1 1 -2 1 -2 1 4 7 20-4-4 1 1 -2 1 The orthogonal complement of the column space of A is the span of the set a. ((-2,2,3,0), (-1,0,0,1)) b. {(-2,2,3,1),(-1,0,0,1)) C. {(2,2,3,0), (-1,0,0,1)) d. ((-2,2,3,0), (1,0,0,1)) e. {(-2,2,3,0))

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