Mode

(a)

(b)

(c)

(d)

1

4.72840

4.72840

4.72840

4.72840

2

7.84690

7.84690

7.84691

7.84691

3

10.9800

10.9800

10.9800

10.9800

4

14.1062

14.1062

14.1064

14.1062

5

17.2246

17.2246

17.2351

17.2246

6

20.3338

20.3338

20.2018

20.3338

7

23.4325

23.4525

22.8735

23.4321

8

26.5192

26.5192

24.6660

26.5196

9

29.6033

29.5926

28.6697

29.5995

10

32.6684

32.6514

35.7924

32.6686

11

36.2185

35.6946

44.8738

36.1004

12

39.3662

38.7209

60.4641

38.2183

13

46.4220

41.7293

70.3342

40.0346

14

49.8430

44.7189

97.8335

43.7535

15

68.0861

47.6888

188.720

45.4447