1.---1

2.---2

3.---1

4.---2

5---1pt. per name, 1 pt. per discoverer, 1 pt. per date of discovery

6.---1

7.---1

8.---1

9.---1

10.---1

11.---1

12.---1

 

Total points 72.

65-72 A

58-64 B

51-57 C

44-50 D

43-0 F