Fix all grammatical errors: Each people has both of strong points and weak points, and human beings often learn how to deal with problems by observing other people that are good at what they are poor at.
The people who are good at the art of the piano are the ones who can play the piano well.
Corrected: The people who are good at the art of the piano are the ones who can play the piano well.
Corrected: The people who are good at the art of the piano are the ones who can play the piano well.
Corrected: The people who are good at the art of the piano are the ones who can play the piano well.
Corrected:
The people who are good at what they are poor at are the ones who are good at what they are poor at.
Corrected: The people who are good at what they are poor at are the ones who are good at what they are poor at.
Corrected: The people who are good at what they are poor at are the ones who are good at what they are poor at.
Corrected: The people who are good at what they are poor at are the ones who are