It's 50 over the square root of n, square root of 14. So all of our choices have the 700 there. So we just need to figure out what our margin of error, this part of it, and we could use a calculator for that. Okay, 2.16, I could write a zero there, it doesn't really matter, times 50 divided by the square root of 14, square root of 14. We get a little bit of a drum roll here, I think. 28.86, so this part right over here is approximately 28.86. That's our margin of error.