| Value | Category | Cases | |
|---|---|---|---|
| 1 | difficult | 10 |
7.5%
|
| 2 | easy | 42 |
31.6%
|
| 3 | neutral | 3 |
2.3%
|
| 4 | verydifficult | 2 |
1.5%
|
| 5 | veryeasy | 76 |
57.1%
|
| Missing value | 17 |