Knowing this will help me provide the exact steps or information you need.
You only need to open/extract mk.part1.rar . The archiving software (like WinRAR or 7-Zip ) will automatically detect the other parts and join them to extract the complete file. mk.part1.rar
If you try to extract part1 without having part2 (or subsequent parts) in the same directory, the extraction will fail with an "unexpected end of archive" or "missing volume" error. Knowing this will help me provide the exact