Refer to problem S6.16. If the defective rate was 3.5 % instead of 1.5%, what would be

Question:

Refer to problem S6.16. If the defective rate was 3.5 % instead of 1.5%, what would be the control limits (z = 3)?
In problem S6.16, In the past, the defective rate for your product has been 1.5%. What are the upper and lower control chart limits if you wish to use a sample size of 500 and z = 3?