помогите Rewrite these sentences in the active 1) All the contracts

Помогите
Rewrite these sentences in the active
1) All the contracts are signed by the President.
2) Her correspondence is read by her every day.
3) We are given a lot of advice by our parents.
4) Most of the Earth's surface is covered by water.
5) Newspapers are bought by them every morning.
6) The lectures on mathematics are not always attended by the students.