A Manufacturer of Television Wall Mounts Would Like to Make

A manufacturer of television wall mounts would like to make a chart to monitor the percentage of defective mounting brackets due to problems with drilled holes.These holes may be defective because they are off-center,out of round,or not drilled.Five samples,each of size 100,have been taken from the production process and the discrepancies are as follows: Using this information and a 3 standard deviation chart,the upper control limit is

A) 0.0025.
B) 0.0420.
C) 0.0602.
D) 0.102.