1. Let's clarify the problem you want to revise or correct. Please provide the original problem or the specific error you noticed. 2. Once you provide the problem, I will restate it clearly and identify the error. 3. I will then show the correct formula or method to solve the problem. 4. I will explain each step in detail, showing all intermediate calculations. 5. Finally, I will provide the correct answer with explanations. Please share the problem or the error you want me to revise.