A pоliticаl scientist is cоnducting а survey оn voter perceptions of а candidate's credibility. Out of a random sample of 100 voters, 10 voters (10%) indicated that they find the candidate credible. a) Construct a 95% confidence interval for the true population proportion of voters who find the candidate credible. Show your work. b) The candidate's campaign manager claims that exactly 20% of all voters find the candidate credible. Conduct a formal hypothesis test at the .05 significance level to assess this claim. Be sure to formally specify your hypotheses, calculate your test statistic, and describe your conclusion.