Tell me about a time you were given an ambiguous, calculation-heavy case and the interviewer or stakeholder kept pushing you to 'not go too far.' Describe: (1) the precise ambiguity you identified (e.g., whether an 80/20 donor mix in a population should be assumed within a 100-person constrained subset), (2) exactly how you paused and aligned on assumptions and decision criteria, (3) the quantitative impact of your clarification on the recommended option (include numbers), (4) how you balanced pushing for strategic context vs executing the requested calculations, and (5) what you would do differently next time to maintain rapport while improving the problem framing.