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3. (0.5 points) Consider Q=1/32/32/32/31/32/32/32/31/3, please answer the following questions, A. Is Q orthogonal? If Yes, please prove it. If No, why? B. What is

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3. (0.5 points) Consider Q=1/32/32/32/31/32/32/32/31/3, please answer the following questions, A. Is Q orthogonal? If Yes, please prove it. If No, why? B. What is Q1 ? Note that Q1 is matrix inverse of Q. Please write down the matrix and explain how you get that matrix

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