+ + 2 4 8 III. 3 + - 3 3 9 III. 4 + - 2 3 6 III. 2 + - 2 4 8 III. 3 +

+ + 2 4 8 III. 3 + - 3 3 9 III. 4 + - 2 3 6 III. 2 + - 2 4 8 III. 3 +