Answer 1

https://code.sololearn.com/W14QyiwTufqs/?ref=app

Answer 2

- Create an array
- for loop to create and add the var to the array and make it visible
- select the Line with array index (be careful, index 0 is Line 1)

Is There an error in class name ? I think you should have one class by var.

Answer 3

I have not test the code, sorry 😄