Explanation:

Box 1: No
Device1 is in Group2 as Name starts with Device and Tag contains Inventory.
However, the Group2 has alert severity low.
Box 2: No
Computer1 does not belong to either Group1 or Group2
Box 3: Yes
Device3 belongs to both Group1 and Group2.
Note: Understanding alert severity
Microsoft Defender Antivirus and Defender for Endpoint alert severities are different because they represent different scopes.
The Microsoft Defender Antivirus threat severity represents the absolute severity of the detected threat (malware), and is assigned based on the potential risk to the individual device, if infected.
Reference: https://docs.microsoft.com/en-us/microsoft-365/security/defender-endpoint/alerts-queue