rounded to three secimsl places please!

Five data entry operators work at the data processing department of the Singham Bank Each day for 30 days, the number of defective record in sample of 200 records typed by these operators has been nood, as to Sample No Sample No No. No, Detectives Sample No Detectives No. Defectes 1 11 7 21 17 2 5 12 4 22 12 20 13 16 23 7 4 11 14 3 24 7 5 11 15 10 25 12 6 8 16 7 26 10 7 13 17 11 22 13 8 10 18 3 5 3 5 19 17 11 10 14 20 15 30 4 a) Establish Jepper and lower controls UCI, - enter your as a number between 0 and rounded to reden place LCL, fenter your responses a numberben und sounded to trade in place b) Why are the lower connot be negative number