Five data entry operators work at the data processing department of the birmingham bank. each day for 30 days, the number of defective records in a sample of 200 records typed by these operators has been noted, as follows: sample no. no. defectives sample no. no. defectives sample no. no. defectives 1 7 11 6 21 18 2 6 12 6 22 12 3 20 13 15 23 6 4 10 14 3 24 6 5 10 15 11 25 14 6 8 16 7 26 9 7 12 17 13 27 14 8 10 18 5 28 6 9 5 19 17 29 11 10 14 20 16 30 4 a) establish 3sigma upper and lower control limits. ucl subscript p =