Напишите предложения в вопросительной и утвердительной форме: 1. there is a poster on the wall. 2. there are many students in the hall. 3. there is a limit to the resources. 4. there are different ways to earn income.

1) Is there a poster on the wall?
There isn't a poster on wall.
2)Are there many students in the hall?
There aren't many students in the hall.
3)Is there a limit to the resources?
There isn't a limit to the resources.
4)Are there different ways to earn income?
There aren't different ways to the earn income.