number generator. how to show that a number is/is not a generator? 
I have this question. But I am real weak at generator and do not how to tackle this problem? Can anyone give me some guidance? thanks :) 

Hint: The questions are related. So start in the beginning: Find the sets $\{5,5^2,\ldots,5^{22}\}$ and $\{1,3,3^2,\ldots,3^{22}\}$. When you got this right, the question for the generators is not too hard any more.
