| Value | Category | Cases | |
|---|---|---|---|
| 1 | difficult | 12 |
9.9%
|
| 2 | easy | 72 |
59.5%
|
| 3 | neutral | 21 |
17.4%
|
| 4 | verydifficult | 3 |
2.5%
|
| 5 | veryeasy | 13 |
10.7%
|