4 4.5 4 4 3 3 3 3 3 3 3 3 3 2 2 2 2 2 2 2 2 2 2 3 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 3 4.5 2 4.5 3.5 1 4 1 . 1-2 1-2 1-2 1-2 1-2 1-2 1-2 1-2 2-3 2-3 2-3 2-3 2-3 3-4 3-4 3-4 3-4