diff --git a/book/exercises/005a.md b/book/exercises/005a.md
index b213bbc..e46cf3b 100644
--- a/book/exercises/005a.md
+++ b/book/exercises/005a.md
@@ -25,34 +25,34 @@ Can you include a page from someone else’s book into your own using `external:
        - external: https://github.com/TeachBooks/manual/blob/release/book/examples/book_structure.md
        ```
 
-2. Add the `external:` link into the `parts:` or `chapters:` section of your `_toc.yml` file.
+2. Add the `external:` link into `chapters:` section of your `_toc.yml` file.
 
 3. Save the changes, commit, and push them.
 
 
 ````{admonition} Example
-  `_toc.yml` snippet:
+`_toc.yml` snippet:
 
-  ```yaml
-  format: jb-book
-  root: intro
+```yaml
+format: jb-book
+root: intro
 
-  chapters:
+parts:
+  - caption: Contents
+    chapters:
     - file: 001
     - external: https://github.com/TeachBooks/manual/blob/release/book/examples/book_structure.md
     - file: 003
-  ```
+```
 ````
 
 4. When you are ready, commit your changes to the repository by clicking on the green `Commit changes` button.
 
 5. Add a commit message.
 
-6. To see your changes, go to {octicon}`play` `Actions` - The most recent workflow run `overview.md / the commit message of the commit you just made` - Wait for it to finish - In the summary, click on the link of your book shown in the table `Branches deployed` and under `Primary book at root` (getting bored of waiting? There'll be exercising on doing this locally which prevents you from waiting).
+6. To see your changes, go to {octicon}`play` `Actions` - The most recent workflow run `the commit message of the commit you just made` - Wait for it to finish - In the summary, click on the link of your book shown in the table `Branches deployed` and under `Primary book at root` (getting bored of waiting? There'll be exercising on doing this locally which prevents you from waiting).
 
-7. Do you see your change? If you don't see it click `CTRL`+`F5`/`Control`+`F5`to refresh the page.
-
-8. When viewing your book online, open the reused page. At the top, you should see an **attribution box**. This confirms the external content is working correctly and shows where it was sourced from. 
+7. Do you see your change? If you don't see it click `CTRL`+`F5`/`Control`+`F5`to refresh the page. Open the reused page. At the top, you should see an **attribution box**. This confirms the external content is working correctly and shows where it was sourced from. 
 
 ```{figure} https://github.com/TeachBooks/template_figures/blob/main/external_page_attribution.png?raw=true
 :name: external_page_attribution