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5 5 10 8. Let A = 4 -7 -11 , and define W = {C E Mzx3 : CA = 02x3]- -2 5 7

5 5 10 8. Let A = 4 -7 -11 , and define W = {C E Mzx3 : CA = 02x3]- -2 5 7 a. Prove that W is a subspace of M2x3. b. Find a basis for W and give the dimension of W

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