PLEASE HELP WITH THIS ONE QUESTION

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?

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Tcan be concluded that % of the seniors would prefer to see more candid pictures in this year's edition of the yearbook.