all the help would be appreciated

Exercise 9.25 (Algo) (LO9-4) Suppose the US. president wants to estimate the proportion of the population that supports his current policy foward revistons in the health care system. The president wants the margin of error to be 0.03 . Assume a 95% leval of confidence. The president's political advisors found a similar survey from two years ago that reported that 55% of people supported heaith care revisions. a. How large of a sample is requited? (Round intermediote values to 2 decimol points. Round your onswer up to the next whole number.) b. How large of a sample would be necessary if no estimate were avallable for the proportion supporting curreat policy? (Round intermediate volues to 2 decimal points. Round your answer up to the next whole number.)