Since Windows does not natively support the .7z format as deeply as .zip , you should install a third-party archiver:
is a compressed archive file typically used for web-related educational exercises, labs, or software components. To access its contents, you will need to download and use the 7-Zip utility, as standard Windows tools often cannot open ".7z" extensions. Step 1: Get the Extraction Tool
Look for a README.txt or instructions.pdf for the specific guide on how to complete the lab.