7.71 Estimating Sample Size (Example 14) Pew Research conducted a study in 2018 to estimate the percentage of Americans who do not use the Internet. a If a 95% confidence level is used, how many people should be included in the survey if the researchers wanted to have a margin of error of 6%? b. How would the sample size change if the researchers wanted to estimate the percentage with a margin of error of 4%? c. What is the relationship between the size of the margin of error and the sample size