If the file is locked, you will need the specific password set by the creator to finish extraction. Contextual Possibilities
"wt" might be an abbreviation for a specific "Writing Tool" or a personal naming convention (e.g., "Work Term" or "World Topics"). If the file is locked, you will need
These files can be encrypted with AES-256 encryption , requiring a password to view the contents. If the file is locked
7z is a high-compression archive format that often results in file sizes 30–70% smaller than standard ZIP files . If the file is locked, you will need
Since Windows and macOS do not always support 7z files natively, you will likely need a third-party tool to access the essay: