Question: Linear help 4. Suppose A is a 3 x 6 matrix and Rank(A) = 3. Answer the following questions: (a) Is AT A invertible? Explain

Linear help

4. Suppose A is a 3 x 6 matrix and Rank(A) = 3. Answer the following questions: (a) Is AT A invertible? Explain why. (1 point) (b) Is AAT invertible? Explain why. (1 point)

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