${\mu }_1$

${\mu }_2$

∆

N

1

1

1

2

2

2

5

5

5

2

3

5

7

10

15

10

15

20

−0.17

−0.26

−0.36

−0.25

−0.31

−0.36

−0.11

−0.17

−0.20

53

23

12

24

16

12

118

55

38