The only problem is the omission of spaces between words. Otherwise it reads OK. I've marked the missing spaces with this symbol: ^.
We asked people such as the PE^teachers, the teacher who works in the health center, students, friends, and family.
The questions were：
a. Have you ever had trouble^sleeping?
b. What do you think^was the reason for your insomnia?
c. How did you solve^this problem?