Thank you very much for the assistance LeonidS. 

So I put a new RSS block on the profile page and entered the RSS URL as …./user/{profile_id}/submitted/.rss  and unfortunately the RSS feed did not display.   

When I check the URL that is created, it is: .../user/%7Bprofile_id%7D/submitted/.rss 

So, unfortunately, {profile_id} isn't getting replaced with the profile owner's name. I will focus on that wiki page and keep working on it.