| Value | Category | Cases | |
|---|---|---|---|
| 1 | Visible but not used in this lesson | 37 |
31.1%
|
| 2 | Used in this lesson | 16 |
13.4%
|
| 3 | Not visible but available | 8 |
6.7%
|
| 4 | Not available | 58 |
48.7%
|