Cartman finally decided to get rid of his stuffed animal, Clyde Frog, because he was told by his friends to grow up.

Who is "he" in this prior sentence?
Cartman
The professor grading the student's paper said that he was stupid.

Who is "he" in this prior sentence?
the student
Will Smith got his son in a movie since he has much influence in the movie scene.

Who is "he" in this prior sentence?
Will Smith