Lets say A can be reduced to the following matrix using row operations: 1 80 0 0 0 10 -10 0 0 0 1 0 0 0 0 4 8 a) Determine the pivot columns, the basic variables and the free variables. Write the solution to Ax = 0 in parametric vector form. b) Does Ax = b have a solution for every possible b?

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