How do I install the 04t0P000000N9rs for trailhead challenge

So I spent a lot of time on Control Access to Fields in data section trying to create Candidates, permissions and the job application like the ai told me to do then I went into the comments for this challenge and saw I need to install a package.  I've scrolled through pages of comments how do I install the package?  

Thanks 

#Trailhead Challenges