Question: The sizes of two matrices are given. Tell whether or not the product AB is defined. If so, give its size. 1. A, 3

The sizes of two matrices are given. Tell whether or not the product AB is defined. If so, give its size.
1. A, 3 × 4; B, 4 × 5
2. A, 3 × 3; B, 3 × 4
3. A, 3 × 2; B, 3 × 2
4. A, 1 × 1; B, 1 × 1
5. A, 3 × 3; B, 3 × 1
6. A, 4 × 2; B, 3 × 4

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