A) (1.5 ĐIỂM)12 5 6 2 10 3 5 2 12 5 12 4 10 3 10 4

2 .3

4 .9

5 .7

25 .49

2 .3

2 .3

5 .7

5 .7

A

6

3

9

3

12

6

12

5

9

3

9

3

3