Starting from a cluster with at least one NVIDIA GPU, install the device plugin (or confirm it's running), schedule a pod that requests a GPU, prove access with nvidia-smi, and run a real GPU workload while observing utilization. Produce a short writeup that walks each layer of the stack and how you verified it.
nvidia.com/gpu: 1 under Allocatable; a pod whose nvidia-smi prints a populated GPU table; and a workload log line like 'done in 3.1 s on NVIDIA A100-SXM4-40GB'.