Resources: 1 CloudWatch dashboard, 3 widgets (CPU, memory, disk).

Configuration:

• Each widget plots both instances on one graph (not one widget per instance per metric).
• Disk widget dimensions hardcode device=nvme0n1p1, fstype=xfs - valid only because both instances are identical t3.micro/AL2023 with a single root volume.

Verification: Applied, dashboard rendered with live data on all three widgets, screenshotted.