One measure of a population's overall health is the proportion of babies with low birth weight, which is defined to be weight below 5.5 pounds. For some Sub-Saharan Africa countries, let p be the proportion of babies with low birth weight (below 5.5 pounds). Previous study found 13% of babies had low birth weight between 2008 and 2012. If we would like to update this estimate within 0.1% error at 95% confidence, what is the minimum required sample size? Use 1.645 as the upper 5th percentile, and 1.96 as the upper 2.5th percentile for Z-distribution (standard normal)