Explanation

Box 1: Yes
Scenario: Technical requirements: Ensure that an application server can be restored from a backup created during the last five days within 15 minutes.
Instant Restore has 'The instance recovery snapshot(s) for 5 Day(s)'.
Box 2: No
Scenario: Ensure that all the production application servers can restore daily backups from the last 21 days.
The Retention of daily backup point is set to for 14 days only.
Box 3: Yes
Reference:
https://docs.microsoft.com/en-us/azure/backup/backup-instant-restore-capability