keep in mind, this is a class project and not for real. It's going to be Ok for you to guesstimate at some things that you can't find hard data for. This was one thing I always struggled with when taking classes, I treated it as if it was "real" and put way more time into projects than I should have. My classmates would do great with much less effort because they were younger and had not been in the "real word" yet so everything was still pretend and they didn't have the problem with that.