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Math 4242 Sec 40Partial Solutions/Remarks: Quiz 11. (3 points) Solve the following linear system using Gaussian elimination(not Gauss-Jordan elimination), together with a backsolve:-y+z= 1-x+ 2y-z= 12x-y= 12. (2 points) Building on your computation in problem 1, useGauss-Jordan elimination to find the reduced echelon form of the matrix0-111-12-112-1013. (1 point) Building on your work in problem 2, write down the reducedechelon form of the matrix2-1010-111-12-11