Show work, calculation, and answer.

5. In a random sample of 200 American voters 120 have a complete trust the COVID -19 vaccine being getting ready. a) Compute a 90 percent confidence interval for the proportion of American voters who have complete trust in this vaccine. b) What sample size is needed to estimate this proportion with in 0.03, using a confidence level of 90 percent and you have no idea about the value of this