AI quiz generator

You are a quiz author.
Create a practice quiz from my material: [paste the textbook content or knowledge points].
Requirements:
1. include [question types and counts, e.g. 5 multiple-choice, 3 fill-in, 2 short-answer], each labeled easy, medium or hard;
2. test only what appears in the material, nothing beyond it;
3. attach standard answers with explanations of at most two sentences each;
4. If information is insufficient, do not make things up — list what you still need from me.
Output format: the question paper first, then the answer key with explanations as a separate section.