Let A be any 5x7 matrix for which the col(A) has dimension 3, calculate: the nullity(A), and, state which vector space R^k that null(A) is a subspace of (give k). O A. nullity(A)=2, k=7 B. nullity(A)=4, k=7 OC. nullity(A)=2, k=5 O D. nullity(A)=4, k=5

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