Add more exercises

Add more socrative questions / making the students figure out the workflow steps themselves rather than showing them first

Based on post workshop debrief and @kkiesling's experience

No files or tests are named. Start by reviewing the lesson's existing Socrative questions and workflow-step activities, using the post-workshop debrief and @kkiesling's experience as context. Done means adding clearly specified exercises that make students work out the workflow steps themselves.

Written by the indexing model from the issue text.