help please !!

Five data entry operators work at the data processing department of the Bimingham Bank. Each day for 30 days, the mumber of delective records in a sample of 300 records typed by these operators has been noted, as follows: a) Establish 30 upper and lower control limits. UCL Lp (enter your response as a number between 0 and 1. rounded to three decimal piaces) LCLn= (enter your response as a number between 0 and 1 , rounded to three decimal places) b) Why can the lowet control limit not be a negative number? b) Why can the lower control limit not be a negative number? A. Since the upper control limit cannot be a negative number. B. Since the percent of defective records cannot be a negative number. C. Since the percent of defective records is always a positive number. D. Since the upper control limit is positive. c) The industry standard for the upper control limit is 0.10. What does this imply a The industry standard is the standard at Birmingham Bank