. 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 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 2 2 2 2 2 2 3 3 3 3 3 3 4 . . . 4.5 4 2.5 0.5 0.5 0.5 0.5 0.5 1 1.5 2.5 1 - 2 1 - 2 1 - 2 3 - 4 2 - 3 2 - 3