reordering backlog tasks for sprint 3 due to added dead code work

Author: Poonam-raj

Sprint-3/3-stretch/README.md Sprint-3/4-stretch/README.mdSprint-3/3-stretch/README.md renamed to Sprint-3/4-stretch/README.md

@@ -9,8 +9,10 @@
 > Do the prep.
 
 This sprint you are expected to produce multiple different pull requests:
+
 1. One pull request for the `1-implement-and-rewrite-tests` directory.
 2. One pull request for the `2-practice-tdd` directory.
-3. Optionally, one pull request for the `3-stretch` directory.
+3. As a stretch goal, one pull request for the `3-dead-code` directory.
+4. Optionally, one pull request for the `4-stretch` directory.
 
 Each directory contains a README.md file with instructions for that directory.