The air temperature is measured every 6 hours for one week. The temperatures are given in the data table

Data_# Temperature

1 41.8

2 57.9

3 43.7

4 41.9

5 43.8

6 52.1

7 42.5

8 42.1

9 55.6

10 57.5

11 43.1

12 45.9

13 58.7

14 57.6

15 52.6

16 45.2

17 47.5

18 50.9

19 44.8

20 41.1

21 44.9

22 54.5

23 44.8

24 44.2

25 40.8

26 52.6

27 53.5

28 47.8

a. Draw a systematic sample consisting of 2temperatures, and then calculate the sampling error for the sample

b. Draw a systematic sample consisting of 4temperatures, and then calculate the sampling error for the sample

c. Draw a systematic sample consisting of 7temperatures, and then calculate the sampling error for the sample