1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 3 3 3 3 3 3 3 4 4 4 4 4 2 3 2 2 2 2 2 2 2 2 . . . 4.5 4 1 1 2.5 0.5 0.5 0.5 1