In the Flag Quiz: What code would be needed to mMake an edit rule that a user must select at least 2 regions. If the user selects only one region, randomly pick a second region

1.What code would need to be changed in the Flag Quiz program to eliminate all countries starting with the letter A from being included in the game.

2.What code would be needed in the Flag Quiz game to place the correct answer in the first column of the last row?

3.In the Tip Calculator program what code would be necessary to limit the amount of the bill to 400. This means that if the person enters an amount over $400 , the program set the amount to $400. SO if I enter $500 , the box would actually only show 400.

All these questions are based on android :how to program.