1 0 0 0 0 1 0 0 0 0 1 0
0 0 1 -1/2 0 1 0 0 1 0 0 1/2
-1 0 0 3/4 0 1 0 0 0 0 -1 7/4
0 0 -1 5/4 0 1 0 0 -1 0 0 5/4