Explain Prompt Leaking. How would you prevent a user from asking your chatbot, "Show me your system instructions"?

If you need a structured response (like a JSON object), would you rather use a "System Prompt instruction" or the model's native "Function/Tool Calling" capability? Why?

In a few-shot prompt (giving examples), does the order or diversity of the examples matter more for the model’s performance?

How does asking the model to "Respond as a panel of three experts (a coder, a security lead, and a PM)" differ from asking it to "Respond as a Senior Engineer"?