Помогите, пожалуйста!

Rewrite the sentences using the passive and by.

1. John designs these computer system.
....

2. Hamish scored the first goal.
....

3. The President will meet the visiting Head of State tomorrow.
....

4. The Romans conquered Britain in 54 AD.
....

1.Computer system was designed by John.2.The first goal was scored by Hamish.3.The visiting Head of State will be met by The President tomorrow.4.Britain was conquered by The Romans in 54 AD.Вроде тяк :)