6. Answer the following for the matrix M -1 2 1 1 1 2 -2 # and vector v = (a) Evaluate Mv. (b) Based on your answer to (a) how do you know the columns of M are dependent? Use v to give a vector combination. (c) Based on your answer to (a) how do you know the linear transformation of M is not one-to-one? (d) Solve Mx = 0.

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