Update README.md

README.md

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 *** Individual research question***
 
 >  K.Tharmikan  
+1. What are the additional requirements for the song recommendation system?
+2. What machine learning model can be selected and trained to classify facial expressions for a song recommendation system?
+3. How can the machine learning model be integrated into a song recommendation system?
+4. How can the system adapt to changes in the user's facial expressions?
+
+
 * Individual objectives
 * Other necessary information