Suppose that the reduced row echelon form of the augmented matrix associated 10 1 with the system of linear equations is 0 1 -1 -2 . Using the variables 0 0 0 0 , y, and Z what is the solution to the system of equations? Ox = 0, y = -2, z=0 Ox = -z, y = z - 2 where Z is arbitrary Ox = z, y= -z - 2 where Z is arbitrary the system is inconsistent none of the above