Kindly refer the given PPT and video and underline the important points in textbook:
PPT:
https://drive.google.com/file/d/1lVy-MQ-wUd3oMqpxnOj-zwaKkxfMkpG4/view?usp=drivesdk
Video:
https://drive.google.com/file/d/1lS6OotLzZ9p2mbK3ynOM_Qhry0Yqcx0d/view?usp=drivesdk