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If the matrix A is 4×2, B is 3×4, C is 2×4, D is 4×3, and...

If the matrix A is 4×2, B is 3×4, C is 2×4, D is 4×3, and E is 2×5, what are the
dimensions of the following expressions

a) A^TD + CB^T

b) (B + D^T ) A

c) CA + CB^T

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