Note to update Tableau assignment reqs

docs/my_notes_body.md

@@ -65,6 +65,10 @@ To Do (4):
   where if you pass the function '/foo/bar', '/foo/bar' it should return
   ('..', '.') and not the other way around.  This case actually happens
   at the very beginning of the iteration.
+* Clarify Tableau requirements to say that they should demonstrate that their
+  cross-vis filter is working by doing screen caps with two different subsets
+  filtered (or all data and one subset).  I'm not sure how to clarify the
+  requirement that some data element needs to be "computed".