Please help me wonderful people! its math!!

In a school 2/3 of the students study a language of those who study a language 2/5 study french

Let the mean of the population be 38 instances of from 6" - 9" hatchings per nest, and let the standard deviation of the mean be 3. what sample mean would have a confidence level of 95% or a 2.5% margin of error?

Find the midpoint m of z1=(8+5i) and z2=(12+3i)