1. Say whether the following vectors are linearly independent and whether the vectors form a basis of R³. Support your answers with reasons. (a) {(1,2,3), (-1,2,3)}. (b) (c) {(2,-2, 1), (0, 2, -2), (2, 0, -1)}. (d) {(1,2,3), (-1, 2, 3), (0, 0, 0)}. {(1, 1, 1), (1,-1,-1), (-1, 1, -1), (-1,-1, 1)}.

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