Shown below are matrix A and its rref, R. 3 A = -6 0 b. Find nullity (AT). 050 1 1 5 01 1 2] 00-4 5 00 00 2 a. Find a basis for the column space of A. R= 1 0 01 ¹0 0 3 3 2 2 - - 5 5 000 0 0 1 3 -1 1

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