5. Let 1 -1 -2 0 1 1 A 1 6= 2 1 1 -2 4 -1 k (a) Find RREF of augumented matrix A : b. [4:6]. (b) Find k such that A = 6 is consistent. Then solve i in parametric vector form. (c) Find a basis and the dimension for Nul (A). (d) Find a basis and the dimension for Col (A). (e) Find rank (A) =?

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