A certain percentage of all football helmets have manufacturing flaws that could potentially cause injury to the wearer. To estimate the defect rate p, a sample of 100 helmets revealed that 17 helmets contained such defects. 1. Find a 95% two sided CI on p. 2. How large a sample would be required to be at least 95% confident that the error in estimating the defect rate is less than w = 0.06?