The solutions for this lab can be found here.
If you require unzipping software, 7zip is a good choice: http://www.7-zip.org/ (or Keka for Mac http://www.kekaosx.com/en/)
After unzipping the solutions, it might be a good idea to copy the folders to your sketchbook folder. From Processing, you could then use File, followed by Sketchbook to easily open them.