1. Let's clarify the problem parts you mentioned: a, b, and c. 2. Since you understand parts a and c but not b, let's focus on part b. 3. Please provide the exact statement or question for part b so I can explain it step-by-step. 4. Once I have the details, I will break down the solution with clear explanations and intermediate steps. 5. This approach will help you understand part b thoroughly.