Do you want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the proportion population is approximately P equals 47%. He would like to be 99% confident...

Do you want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the proportion population is approximately P equals 47%. He would like to be 99% confident that your estimate is within 5% of the true population proportion. How large of a sample size is required?