| Value | Category | Cases | |
|---|---|---|---|
| 1 | difficult | 4 |
5.1%
|
| 2 | easy | 47 |
59.5%
|
| 3 | neutral | 6 |
7.6%
|
| 4 | verydifficult | 4 |
5.1%
|
| 5 | veryeasy | 18 |
22.8%
|