Which pronoun would best replace the red words in the following sentence?

"Let's think of a way to clean up rubbish," Mohan and Logan said.

Which pronoun would best replace the red word in the following sentence?

Aminah told Ahmad that he could use things over again.

Which pronoun would best replace the red words in the following sentence?

Ahmad and Aminah collected bottles.

Which pronoun would best replace the red word in the following sentence?

Aminah wants to help.

Which pronoun would best replace the red words in the following sentence?

The students clean the park and the streets.

Which pronoun would best replace the red words in the following sentence?

Muhammad began to pick up paper from the grass at the park.

Which pronoun would best replace the red words in the following sentence?

Jamal and Kamil are happy to get involved in a recycling project at school

Which word is a pronoun in the following sentence?

We play in the music room every day after school.