A) Solve the linear system x1 + 3x22x3 4x1 + 2x2x3 4x13x2 + 3x3 - 2x4 = 4 = 4 -2 using the Gauss-Jordan elimination method. B) Let Ax = b be the matrix form of a linear system. Suppose that the matrix A has a zero column, that is, all elements of the column are zeros and it is known that the linear system has solution. Discuss the solutions of the linear system. Give a detailed explanation to your answer.

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