Complete parts (a) and (b) for the matrix below. 1-8 8-4 9 3 4-1 7 -5-7 -6 -8 05-6 1 A= -4 -8 -2 (a) Find k such that Nul(A) is a subspace of R*. k= 4 (b) Find k such that Col(A) is a subspace of Rk. C

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