Problem 13. Consider the following system of linear equations: 21+3+2x4+ 3x = -1 1+2+3-2x5=4 2x2-4x4-7x5 = 4 (a) Write in the augmented matrix for the system. (b) Reduce the augmented system to its reduced row echelon form. (c) Describe all solutions to the system.

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