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Your team is developing a backend application to process real-time analytics for a music streaming platform. The backend has the following technical requirements: Persistent WebSocket connections are required for user sessions. Connections remain active for the duration of the streaming session, ranging from 5 minutes to 2 hours. Traffic spikes occur during evenings and weekends. The backend should automatically scale based on user demand while minimizing cost and operational overhead. Where should you deploy the backend application?