pt 1
https://www.dropbox.com/scl/fi/33ylho3hox6qolif8sq91/bts-book-chapter-4-pt-1.mkv?rlkey=y3l954sfx6qkrzzdkq81wki4u&dl=0
pt 2
https://www.dropbox.com/scl/fi/p4tiogfr6uhxhv0jeapoz/bts-book-chapter-4-pt-2.mkv?rlkey=89l170q7w3n2ijcasyof4dyj1&dl=0
pt 3
https://www.dropbox.com/scl/fi/qcjmp0cw2abuaae32em4i/bts-book-chapter-4-pt-3.mkv?rlkey=6y88plrkeq7pg8frwmfu38jjs&dl=0