| Value | Category | Cases | |
|---|---|---|---|
| 1 | difficult | 18 |
6.7%
|
| 2 | easy | 136 |
50.7%
|
| 3 | neutral | 28 |
10.4%
|
| 4 | verydifficult | 7 |
2.6%
|
| 5 | veryeasy | 79 |
29.5%
|