Individual Responses
    This table shows how each user responded to each 
    question in each of their attempts at the quiz.
    The responses are color-coded as follows:
    
        - Correct answers
- Ignored answers (if any)
- Wrong answers (if any)
- score% (hints,clues,checks)
            
                - score is the percentage score for this question
- hints is the number hints requested
- clues indicates whether the clue was shown (=1) or not (=0)
- checks is the number checks performed on this question.
                A value of "-1" means that the student clicked the "Show answer" button