=+checkout process. A quality control team would like to determine whether a scanner is working properly. A sample of 500 scans is taken daily and the number of times the scanner is unable to read the bar code is determined. Out of 500 scans, management would like an average of no more than 7 manually entered bar codes. The results for the last 25days are shown in the following table.

Day Scanners Failure 1 1 2 5 3 9 4 4 5 5 6 6 7 3 8 5 9 6 10 4 11 3 12 5 13 2 14 7 15 7 16 10 17 5 18 4 19 5 20 5 21 9 22 10 23 4 24 3 25 9

a) Create a c chart.