4 4 4 3 3 3 3 3 3 3 2 2 2 2 2 1 1 1 1 1 1 2 2 2 2 1 1 0.5 1 1 1 2 2 2 1 1.5 2.5 2.5 4 3.5 3.5 4.5 0.5 0 1 2 1 .