Lecture 1:
https://nptel.ac.in/content/storage2/courses/105101085/downloads/lec-2.pdf
Lecture 2:
https://nptel.ac.in/courses/112/105/112105164/
Lecture 3:
https://nptel.ac.in/courses/105/105/105105108/
Lecture 4:
https://nptel.ac.in/courses/105/105/105105166/
https://nptel.ac.in/courses/112/105/112105164/
Lecture 5:
https://nptel.ac.in/courses/122/104/122104014/
Lecture 6:
https://nptel.ac.in/courses/115/104/115104094/
https://nptel.ac.in/courses/122/104/122104014/