| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 |
0.2%
|
|
| 1 | Easy | 168 |
29.8%
|
| 2 | Difficult | 203 |
36%
|
| 3 | Impossible | 174 |
30.9%
|
| 9 | Not Applic | 18 |
3.2%
|