welcome to the forum.
there are problems with your notations. you must first get those right. moreover you write "nEZ (where Z is an integer)". this does not make much sense. read the original problem. understand what is being asked... take your time and when you start to see that the problem really makes sense then re-attempt it. if then you can't do it then re-post it along with your attempt. Me and others will be happy to help.