Write an ARM64 assembly program in /app/conteo atras.s that performs a countdown.

Write an ARM64 assembly program in /app/conteo atras.s that performs a countdown.: a task in rts-1k-rootless-apptainer: RTS-1K: offline rootless Apptainer release (Harbor dataset). What the agent is asked, how it is graded, what it runs in, and its files.