If you don't understand this question, you can ask. If you are satisfied, please click "Adopt as Satisfied Answer" in the lower right corner.

If you have any other questions, please adopt this question, and then post and click on my avatar to ask me for help. Not easy to answer, please understand, thank you.

O(∩_∩)O, remember to adopt and help each other.

I wish you progress in your study!