Underline word or phrase that needs correctino in each of the following sentences and provide correction

Underline word or phrase that needs correctino in each of the following sentences and provide correction.
1. We change design of our tradition products to attract more costumes.
2. The artisan moulded the clay for that he could make a mask.
3. They had to look down the museum because it's no longer a place of interest.
4. We had better reviewing this chapter carefully before the exam.
5. Nowadays, few tourist come to this area, don't they ?