Accessing data - Create and implement a WCF Data Services service

You need to return all questions that have an Id greater than 5. Which query should you use?

http://servicehost/ExamPrepService.svc/Questions?$filter(ID> 5)
http://servicehost/ExamPrepService.svc/Questions?$select(Id) gt 5
http://servicehost/ExamPrepService.svc/Questions(>5)
http://servicehost/ExamPrepService.svc/Questions?$filter=Id gt 5