Solve puzzle-four.md

[s-m-quadri]

Answer each question in a separate commit, and make a pull request.
Take your time!

How?

1. Copy Code to your repository:

   • Fork this repo.

2. Start IDE (any 1 from below):

   • Clone your version of repository to your local PC, and start VS Code IDE.
   • Edit File directly via GitHub GUI.
   • Open Code Spaces, i.e. Cloud based IDE, from GitHub.

3. Solve the problem.

4. Update Changes:

   • Do add, commit with proper title, and push, if using IDE. Otherwise, just commit with proper title.
   • Finally, make a Pull Request to this repository.