The quick questions about set and logic.

I’m stuck on a Mathematics question and need an explanation.

There are seven short questions, which won’t take your much time if you are good at solving them. I need the experimental tutor who good at set and logic. Just paying attention on reading question carefully and answers them as detailedly as you can.

Please read questions carefully. Don’t be confused by a large number of texts, most of them are explanations and descriptions, which helps you better understand the topic. Please bids kindly and looking forward to working with you. Thank you for your attention.