4

I’m ready to help, but I’m not sure what you want with “4.” Do you want 4 practice questions? If so, please tell me:

• Subject and level (e.g., Calculus I, Linear Algebra, Statistics, Physics)
• Format (short-answer or multiple-choice) and whether you want full solutions
• Any topics to focus on (derivatives, integrations, proofs, etc.)

If you’re not sure, I can start with a quick set of 4 Calculus problems (derivative basics, chain rule, optimization, and applications) with solutions. Would you like me to do that, or specify a different subject?