As a beginner, I am listening to the lectures well. In particular, the 'Ask a question' function is very helpful. I am studying the parts that I do not understand well or am lacking on the Internet, but there are times when I am lost because I do not know exactly what I do not know and do not know how to search. At this time, the 'Ask a question' function is a rain in a drought for beginners. If I have any wishes, 1. I wish the lectures were in the form of a textbook (so that I can use it as a reference material) and 2. It would be better if simple practice problems were given for each chapter so that I can review what I learned. I will listen hard with the goal of completing the course! Thank you for the great lecture :)