Use row reduction to find the inverse of the matrix:
[1 -2 -3; 0 3 3; 3 1 -3]

a) [-0.4 0.2 -0.2; -0.2 0.2 0.2; -0.2 0.4 -0.2]
b) [-0.2 0.4 -0.2; -0.2 0.2 0.2; -0.4 0.2 -0.2]
c) [0.2 -0.4 0.2; 0.2 -0.2 -0.2; 0.4 -0.2 0.2]
d) [0.4 -0.2 0.2; 0.2 -0.2 -0.2; 0.2 0.4 -0.2]