Digital Circuits Lecture-27: Four-Variable K-map

In this lecture, i discussed four-variable K-map with examples.

For Video Lecture follow the below link: 
https://youtu.be/sxjIpkusniI

For Lecture Material download from follow the below link:
http://www.mediafire.com/file/7npujd9ndfpm7rs/DE-Lec-27.pdf