I have just released Assignment 4. In this assignment, you will have to implement asynchronous programming for the lab from Assignment 1. This post explains how to start working on it.
You can read the specification in the assignments section.
I have also released an intro video on Echo360, accessible through Blackboard where the lecture recordings are. The intro explains how to start the assignment and pass the first test. Students should follow the intro with their IDE open, redoing the same steps, before start working on the assignment.