: Since your file is part2.rar , you must have all parts (e.g., part1, part2, etc.) in the same folder before extracting. You only need to right-click the first part ( part1.rar ) to start the extraction process for the whole set.
: Use official tools like WinRAR or 7-Zip to handle .rar formats.
If you downloaded this file from a third-party site, the password (the "paper") is almost always listed on the where you found the link.