a) {(1,-1,2),(5,-4,1),(7,-5,-4)}. b) {(1,3,3),(1,5,-1),(2,7,4),(1,4,1)}.

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A: Matrices are as follows:To Find: The four subspaces of  associated with the matrices.

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A: a) The set of non-symmetric matrices (for which AT≠A)b) The set of skew-symmetric matrices (for…

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