In a survey of 300 likely voters for the US Elections, 168 responded that they would vote for the Republican candidate, and 132 responded that they would vote for the Democrat candidate. Let p denote the fraction of all likely voters who preferred the Republican candidate at the time of the survey, and let 16 be the fraction of survey respondents who preferred the Republican candidate. Answer the following questions: (a) Use the survey results to estimate p. (b) Construct the tightest possible 100% condence interval for p