bonjours j'ai besoin d'aide (svp) pour mon devoir de anglais exercice 3,4,et 5 merci ​

3- a) is prettier than
It’s the prettiest
b) more courageous
Less courageous
c) bigger than
The biggest
d) smarter than
The smartest
4- a)shorter than
b)as much as
c)younger than me and older than my sister
d)the most expensive
5- a)School bullying is the worst problem we have
b)We all need to have the most positive attitude possible
c)Bullying students suffer less when other students oppose bullying
d) The worst option is to ignore the problem