Rewrite these sentences

Mọi người giải giúp mk vs 
1,John is too young to decide himself 
->John isn't 
2,What about using gas instead of burning coal? (suggest)
-> I
3,I don't find it difficult to stay up late (used) 
-> I
4,"Please,open the window ,Nam" said his brother(asked)
 -> Nam's brother 
5, The question wasn't as hard as though (than) 
-> The question