Cron Fixer

A backup script at `~/backup.sh` exists but is broken: it is not executable and has no cron schedule. Your mission: - Make `~/backup.sh` **executable** - Add a **crontab entry** that runs it every 5 minutes (`*/5 * * * *`) - Run it **once manually** to create an initial backup *Hint: `chmod +x`, then `crontab -e` to edit the schedule.*