7 -9 -4 5 3 -3 -7 -4 6. 7 -2 -6 -5 5 [M] Let A = 5 -7 -6 5 -6 2 -3 5 8 -1 -7 -4 6 -8 -5 3 a. Construct matrices C and N whose columns are bases for Col A and Nul A, respectively, and construct a matrix R whose rows form a basis for Row A. b. Construct a matrix M whose columns form a basis for Nul AT , form the matrices S = [R' N and T = [C , and explain why S and T should be square. Verify that both S and T are invertible. M ],

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