Section C — Design and critique (40 marks) 10. (15 marks) Architect a modular janemodelxx system for a mid-sized product team (10–20 engineers) that must support rapid iteration, A/B testing, and feature toggles. Provide a block-diagram description, list key services/components, and explain data flows for training, serving, and experiments. 11. (10 marks) Critique the following simplified janemodelxx design: "single large model trained end-to-end on all features with weekly full retraining." Identify at least five weaknesses and propose concrete improvements for each. 12. (15 marks) Ethics and safety: enumerate potential ethical risks specific to janemodelxx deployments (at least five). For each risk, propose a mitigation (technical, process, or policy) and briefly explain how you'd validate that mitigation is effective.