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 250 records typed by these operators has been noted, as follows: Sample No. No. Defective Sample No. No. Defective Sample No. No. Defective 1 7 11 18 21 17 2 5 12 5 22 12 3 19 13 16 23 6 4 10 14 4 24 7 5 11 15 11 25 13 6 8 16 8 26 10 7 12 17 12 27 14 8 9 18 4 28 6 9 6 19 6 29 12 10 13 20 16 30 3 Using a p-chart a. Establish 3\sigma upper and lower control limits UCL = 0.077 LCL = 0.003 UCL = 0.075 LCL = 0.003 UCL = 0.077 LCL = 0.001 UCL = 0.077 LCL = 0.005