Answer 1

You can learn how others did it on this assignment in Learn section (mobile app users only).

https://www.sololearn.com/learn/4564/?ref=app

Alternatively, you can visit Code Playground ( https://www.sololearn.com/Codes/ ) and use the search facility to seek for examples.

You can use "Parentheses" (without quotes) as search keyword in Search bar, and pick a language of your choice from language filter menu to the right most side of the Search bar, you'll get loads of code examples to learn from.

Good luck!