(Inline Analytics) Fixes 3 issues:

  - undefined and NAN% was being displayed in text when student data didn't include correct or incorrect.
  - Items in radio display numbered incorrectly when student data missing options at the beginning.
  - Mouseover text included text from the correct and incorrect span.
Can we make this a multiline declaration for readability?

```python
count_dict = count_by_part.get(part_id, {
    'totalAttemptCount': 0,
    'totalCorrectCount': 0,
    'totalIncorrectCount': 0,
})
```