Requirements

1. Users must be able to create poll or survey questions with multiple choices through the web app.
2. Users must be able to specified the polling period by choosing the start and stop date on eack poll or survey.
3. Users must be able to submit a response along the polling period.
4. The Poll owner must be able to revisit a poll page to see the response.
5. The Poll owner must be able to change the poll during the polling period.
6. The Poll must not allow any user to response after the poll end.
7. Other users must not see any poll question before the poll is open.
8. Anyone must be able to view the results of a poll question at any time after the poll has opened.