4

I’m not sure what “4” refers to. Do you mean:

• question 4 from a worksheet or exam,
• a problem statement you want me to solve,
• a topic label (e.g., chapter 4), or
• something else?

If you can paste the problem (or describe the topic), I’ll help with a full solution and explanation. If you’d like, I can also generate a short set of 4 practice questions on your topic and walk through one step-by-step. What would you prefer?