There is one mistake in each sentence. Underline and correct the mistake

Exercise 5: There is one mistake in each sentence. Underline and correct the mistake.
1. Sitting close to the laptop’s screen hurt your eyes.
Correct: ________________
2. You can avoid many diseases by eat healthy food.
Correct: ________________
3. You look so bad! How’s wrong with you?
Correct: ________________
4. Eating lots of fast food can make you fat or obesity.
Correct: ________________