Given 0 W E] Y -1 0 1 -1 use the reduced row echelon form above to solve the system 0 0 -2 12 1 0 9 -8 -6 ~ [1 1 0 0 0 1 0 0 0 0 9 -6 4 3 -4 -3 0 0 0 w + x - 2y + 12z -w-x+y- 8z If necessary, parametrize your answer using the free variables of the system. In other words, write the leading variables in term of the free variables of the system.