If they are seperate sentences, then yes, they are gramatically correct.
Answer:
1. gustan
2. gusta
3. gusta
4. gusta
5. gustan
Explanation:
gustan is usually used when the subject is plural (sports, cookies) and gusta is used when the subject is singular (dance, clock, shirt)
Answer:
What appliance do you use every day?
Answer:
the 3rd one is the answrr