No credit is given for incomplete or incorrect answers after the final due dates. It is strongly suggested that once assigned, a question is answered immediately and handed in for grading. It is possible for the grading of a question to take in excess of 2 weeks. If your work has been graded, it will have the paper clip on the side of the package. Store in a safe place till the final date for submission.
All questions are to be handed in at that time.
Add to your answer. Redo - something's wrong and needs correction. Do not erase your original work, just draw a line through incorrect work so it may still be read. Knowing what you did wrong is important. Source is needed.