A researcher studying public opinion of proposed Social Security changes obtains a simple random sample of adult Americans and asks them whether or not they support the proposed changes. To say that the distribution of the sample proportion of adults who respond​ yes, is approximately​ normal, how many more adult Americans does the researcher need to sample in the following​ cases? ​(a) ​% of all adult Americans support the changes ​(b) ​% of all adult Americans support the changes ​(a) The researcher must ask nothing more American adults. ​(Round up to the nearest​ integer.) ​(b) The researcher must ask nothing more American adults. ​(Round up to the nearest​ integer.)