could you please help me with this question?

3. A researcher, in responding to a request for proposal to conduct a national knowledge, attitudes and practices (KAP) survey on disaster preparedness in a Caribbean Island, suggests the use of a simple random sample. The last survey conducted on the subject in the country, took place five years earlier. At that time, 35% of the population had a satisfactory or better score on disaster preparedness. a. What sample size should the researcher suggest if there is a required precision of #2.5 percent on the proportion of persons with at least a satisfactory score on disaster preparedness. Assume a negligible sampling fraction (f) b. The researcher was subsequently instructed not to ignore f and use a population of 108,000. What is the new sample size given the same level of precision used in a)