In Exercises 9 - 16, find the following matrices: a. A + B 3 1 1 2 - 3 6 A = B = - 1 2 5 - 3 1 - 4

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1. Identify the matrices A and B from the problem: A = \begin{bmatrix} 3 & 1 & 1 \\ -1 & 2 & 5 \end{bmatrix}, B = \begin{bmatrix} 2 & -3 & 6 \\ -3 & 1 & -4 \end{bmatrix}.
2. Ensure that both matrices A and B have the same dimensions, which they do (2x3 matrices).
3. Add the corresponding elements of matrices A and B. For example, add the element in the first row, first column of A to the element in the first row, first column of B: 3 + 2.
4. Continue adding corresponding elements for each position in the matrices: (1,2), (1,3), (2,1), (2,2), and (2,3).
5. Write the resulting matrix from the addition of A and B.