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Explain the concept: {{CONCEPT}}

Give me:
1. A plain explanation for someone with no background (max 150 words).
2. One analogy from everyday life, plus where the analogy breaks down.
3. A fully worked example, step by step, showing the reasoning.
4. Three misconceptions students commonly have about this.
5. Five self-test questions, increasing in difficulty, answers at the end.

Use precise terminology, but define each term the first time it appears.

If I provide lecture material, use it as the primary source and infer the concept and language from it. If anything is missing or unreadable, say what you cannot read and request a clearer copy rather than inventing content. Clearly label any outside clarification.