
David B. answered 02/21/22
Math and Statistics need not be scary
Mish, you need to start doing your own research. For this question you need a formulae for estimating sample size. There are many ways to do this but a simple one taught in most undergraduate classes is the Cochran method. Find the formulae, do some algebra, get the answer.
Rather than give you the definition / formula I will give you a link you could have googled for yourself.
Cochran's Formula: https://www.statisticshowto.com/probability-and-statistics/find-sample-size/
Good luck and do the work.