Assalam-o-Alaikum!
As you all know that Wasif is one of the administrators of this site, so I expected that he would upload his PowerPoint presentation. But I think he forgot to upload his slides or he may be facing low internet speed at home!
The presentation which he chosed was very difficult to present but still he did it smoothly. All the students got satisfactory answers.
Please download his PowerPoint slides from here: