In 4.1.3 Lab, mentioned "download the rest-data-service app jar file". I don't see any link in PDF file. Could you please let me know the process to download rest-data-service app jar file?
Page 4.13, where you download the lab pdf, tells you how to access the course resources (application files). Please follow the instructions accordingly.
Section 1.7 Course Resources, contains all the resources. I too got confused after blindly clicking the LAB and searching for link in PDF.