Use the following equations:
All we need to find now is
We are given 0.95, so we just use the following:
This is a common alpha, and has the corresponding and values:
All you do now is plug and go.
I'll do the n = 100 for you:
So, your CI is between 30.3 and 49.64 percent.
Just do this again for 1000 and 10000.