Solve 3 problems in statistics

Employer
[no-member:pro]Anna[/no-member:pro]Anna
Project parameters
Type of cooperationOne-time project
SectionTexts and translation
Prepaymentwithout prepayment
Payment methodsCash, Bank transfer
Acceptance of requestsclosed
Project description
I have 3 statistics to solve, but I can’t figure it out. If I'm going to be asked how I decided them, then apart from the decision itself, I need to know where and why I came from.