Exercise 2.1
https://www.youtube.com/watch?v=X8WWj0D4K5E&list=PL2qtWkm0Z4ccfmut60zrnjI7NUnq0gVUz
Exercise 2.2
https://www.youtube.com/watch?v=3lb_hAYXVt4&list=PL2qtWkm0Z4cfyUQjMNmWA3hsfNdLRazvd
Exercise 2.3
https://www.youtube.com/watch?v=AuVUt3mcvHw&list=PL2qtWkm0Z4ceFJzs6TAUayIBToXioM7-t
Exercise 2.4
https://www.youtube.com/watch?v=ku4vAFSJ1pE&list=PL2qtWkm0Z4ccGr-nX6-ZHHiqYOZwWJIxe
Exercise 2.5
https://www.youtube.com/watch?v=B43JEQwpqA8&list=PL2qtWkm0Z4cfQFUPkRJs7c1HgKEo5evSZ
Exercise 2.6
https://www.youtube.com/watch?v=q73ubQ7UhG4&list=PL2qtWkm0Z4cd49IZIi_bf-bpF2QilmBuN
Exercise 2.7
https://www.youtube.com/watch?v=eYRV_IZOi6s&list=PL2qtWkm0Z4cdInaA4o-IGu154LvjDrCH7
Exercise 2.8
https://www.youtube.com/watch?v=_bP-k2j5ZuY&list=PL2qtWkm0Z4cdGLo14uWw1-kwAAkaNvcwu
Exercise 2.9
https://www.youtube.com/watch?v=ui4hW-aSJyc&list=PL2qtWkm0Z4cdfVobTYOCVXjApdkNtk4Be
Exercise 2.10
https://www.youtube.com/watch?v=ieuzUNOsLrM&list=PL2qtWkm0Z4cdV5MBlweL5Vgw_XmF240GY
Exercise 2.11
https://www.youtube.com/watch?v=XD2YUUPV01k&list=PL2qtWkm0Z4celqYB7yhqyDFelfbNG2nIi
Exercise 2.12
https://www.youtube.com/watch?v=bw2EYd_GgdI&list=PL2qtWkm0Z4ceDIDBupJbglBneLBH7KHNK
Miscellaneous Problems
https://www.youtube.com/watch?v=-8AenG_gzlo&list=PL2qtWkm0Z4cfgxSFTSrh6KK7C6WICDEWg
Examples
https://www.youtube.com/watch?v=nEFLoxVPwpI&list=PL2qtWkm0Z4cfi7b6XgGBMMkBx9k-mi_xY
https://www.youtube.com/watch?v=X8WWj0D4K5E&list=PL2qtWkm0Z4ccfmut60zrnjI7NUnq0gVUz
Exercise 2.2
https://www.youtube.com/watch?v=3lb_hAYXVt4&list=PL2qtWkm0Z4cfyUQjMNmWA3hsfNdLRazvd
Exercise 2.3
https://www.youtube.com/watch?v=AuVUt3mcvHw&list=PL2qtWkm0Z4ceFJzs6TAUayIBToXioM7-t
Exercise 2.4
https://www.youtube.com/watch?v=ku4vAFSJ1pE&list=PL2qtWkm0Z4ccGr-nX6-ZHHiqYOZwWJIxe
Exercise 2.5
https://www.youtube.com/watch?v=B43JEQwpqA8&list=PL2qtWkm0Z4cfQFUPkRJs7c1HgKEo5evSZ
Exercise 2.6
https://www.youtube.com/watch?v=q73ubQ7UhG4&list=PL2qtWkm0Z4cd49IZIi_bf-bpF2QilmBuN
Exercise 2.7
https://www.youtube.com/watch?v=eYRV_IZOi6s&list=PL2qtWkm0Z4cdInaA4o-IGu154LvjDrCH7
Exercise 2.8
https://www.youtube.com/watch?v=_bP-k2j5ZuY&list=PL2qtWkm0Z4cdGLo14uWw1-kwAAkaNvcwu
Exercise 2.9
https://www.youtube.com/watch?v=ui4hW-aSJyc&list=PL2qtWkm0Z4cdfVobTYOCVXjApdkNtk4Be
Exercise 2.10
https://www.youtube.com/watch?v=ieuzUNOsLrM&list=PL2qtWkm0Z4cdV5MBlweL5Vgw_XmF240GY
Exercise 2.11
https://www.youtube.com/watch?v=XD2YUUPV01k&list=PL2qtWkm0Z4celqYB7yhqyDFelfbNG2nIi
Exercise 2.12
https://www.youtube.com/watch?v=bw2EYd_GgdI&list=PL2qtWkm0Z4ceDIDBupJbglBneLBH7KHNK
Miscellaneous Problems
https://www.youtube.com/watch?v=-8AenG_gzlo&list=PL2qtWkm0Z4cfgxSFTSrh6KK7C6WICDEWg
Examples
https://www.youtube.com/watch?v=nEFLoxVPwpI&list=PL2qtWkm0Z4cfi7b6XgGBMMkBx9k-mi_xY