Решите всё!!!!!! 81.1 81.2 81.3 81.4

Number 1:
big—bigger, slow—slower, expensive—more expensive, high—higher, dangerous—more dangerous.
Number 2:
Strong—stronger; happy—happier; careful—more careful; important—more important; bad—worse; difficult—more difficult; large—larger; far— ну это хз; serious—more serious; crowded—more crowded; pretty—prettier.
Number 3:
Colder—hotter; cheaper—more expensive; better—worse; nearer— ну короче far в сравнительной степени; еasier—harder.