7 answers
Hi,
In the step "Modify Your Data Model" of the same unit it is given how to create a record type make sure you have completed that step.
here is the link of that :
https://trailhead.salesforce.com/content/learn/projects/customize-an-org-to-support-a-new-business-unit/modify-your-data-model
Hope this will resolve your query,
Thanks
Piyush