Follow the instructions attached to the file, provide a model solution that is not duplicated, avoid plagiarism or quoting from articles, books and other sites, write the answers in the same file and make them blue.
Follow the instructions attached to the file, provide a model solution that is not duplicated, avoid plagiarism or quoting from articles, books and other sites, write the answers in the same file and make them blue. Pay attention to grammatical errors and the number of words required. Provide a correct and clear answer.