If the defect rate for a product has historically been about 2%, what are the upper and lower control chart limits for a sample size of 100 and 3 sigma limits?
a) Upper control limit: 6%, Lower control limit: 0%
b) Upper control limit: 3%, Lower control limit: 1%
c) Upper control limit: 8%, Lower control limit: 0%
d) Upper control limit: 2%, Lower control limit: 0%