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A=\left[\begin{array}{cccc} 4 & 12 & 5 & 8 \\ 1 & 6 & 2 & 10 \\ 9 & 5 & 6 & 8 \\ 4 & 7 & 3

& 11 \end{array}\right] Create the 4 x 4 matrix A in MATLAB. Then use the colon operator to create a 3 x 3 matrix B out of the top right corner of A (indicated by the dashed lines). Use the sum function to compute the sum of each column in A. Use the max function to find the highest number in A.

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