· A linear system is given by the following equations 1 xi + x2 2x1 + x2 – 3 3x1 – x2 – X3 1 %3D 3. %3D (a) What will be the value of r1, x2 and r3 if you solve it by Gaussian elimination method? (b) What will be the upper triangular matrix, U, if you solve it using LU-decomposition method? (c) What will be the lower triangular matrix, L, if you solve it using LU-decomposition method?

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