Week #6, Lecture #1

Here is the lecture file:

https://drive.google.com/file/d/1RrHXd5KvbJY_pMLOqkQnJNlAT9-0uHM9/view?usp=sharing

Please finish watching it by Friday.  

Note there will be only one lecture this week, so you can get caught up on the lectures and the assignment.