As I have already given you feedback on the lecture, The output created by the lecture is good. However, the more I listen to the lecture, the more I feel like the instructor sometimes explains the calculation formulas and parameters he has already created, and sometimes he just puts them in the design too naturally, so I can't follow along. Don't reflect it in the next lecture, but rather film this lecture again and clearly explain each element. In addition, the microphone sound quality is not good.