200 mullions are produced each hour, and a random sample of four mullions is taken every half hour. Assume there is no standard given and construct an xbar chart using the following data.

SAMPLE

1. 58.8013. 58.7876 58.7981 58.8053
2. 2 58.8018 58.8023 58.8065 58.8079
3. 58.8015 58.8048 58.8028 58.8012
4. 58.7968 58.8005 58.7940 58.8056
5. 58.8014 58.7941 58.7959 58.8074
6. 58.8116 58.8038 58.8033 58.7861
7. 58.7955 58.8050 58.8096 58.7914
8. 58.7988 58.8015 58.7911 58.7957
9. 58.7958 58.7958 58.8019 58.8005
10. 58.8029 58.7942 58.7964 58.7982
11. 58.8045 58.8049 58.7990 58.7886
12. 58.8071 58.7974 58.7976 58.7970
13. 58.7981 58.8053 58.792 58.7958
14. 58.7991 58.8020 58.8001 58.8052
15. 58.8044 58.8028 58.8046 58.7959
16. 58.8015 58.8028 58.7982 58.8022
17. 58.7949 58.7943 58.7938 58.8048
18. 58028 58.8052 58.8008 58.8045
19. 58.8043 58.8002 58.8029 58.7942
20. 58.8019 58.8005 58.7972 58.7995

1) In this chart, the centerline goes along

a)58.8001

b)58.8002

c)58.0001

d)58.8000

2) The upper control limit is

a)58.7924

b)58.8077

c)0.0000

d)0.0000

3) The lower control limiti is

a)58.7924

b)58.8077

c)58.7982

d)58.8019

4) Would you say the process is in control?

a)YES

b)NO

c)The centerline should be a little be above that value

d)The average range should be a bit smaller

Based on the data from the last exercise, construct an R chart assuming standard given, with sigma0 = 0.0045.

1) In this chart, the centerline goes along

a)0.0093

b)0.0211

c)0.0168

d)0.0070

2) The upper control limit is

a)0.0000

b)0.0211

c)0.0168

d)0.0070

3) The lower control limiti is

a)0.0000

b)0.0211

c)0.0168

d)0.0070

4) Regarding variability, would you say the process is in control?

a)NO

b)YES

c)The centerline should be around 1/4 above the actual value

d)The average range should be a bit larger

I need to submit this task, I have to choose from a to d in each question, may you help me

Thank you