I am asked for data I do not know, what do I do?
You can answer I do not know: it also counts as an answer and you do not have to give the exact value. Yolia prefers to ask you rather than guess, and marks as missing what you did not declare.
In detail
- Measure what you can with simple tools and enter the approximate value.
- If you cannot measure it, mark I do not know and continue.
- Check Home: there you will see which data are missing and how each one changes precision.