Compute the product AB by the definition of the product of matrices, where Ab, and Ab₂ are computed separately, and by the row-column rule for computing AB. -2 3 +8+4 A = 2 5 B= -2 3 - -1 Set up the product Ab₁, where b₁ is the first column of B. Ab₁ = (Use one answer box for A and use the other answer box for b₁.)

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