. 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 4 4 4 5 . . . 6 4 4 5 0.5 0.5 0.5 0.5 2 - 3 2 - 3 1 - 2 1 - 2 3.5 5 3.5