Below is the PDF version lecture 5 (Chapter 4), in powerpoint.

Lec. 5 (Ch. 4) Part 1 => https://drive.google.com/file/d/1W3wcPvB0IpRZTe5J0cFuo7VdQbcR-xiF/view?usp=sharing

Lec. 5 (Ch. 4) Part 2 => https://drive.google.com/file/d/1r4DCMDkZTwew7kWw2ByWPoI7QFoSVADZ/view?usp=sharing