passive voice- proszę bardzo o pomoc

Bardzo proszę o pomoc w rozwiązaniu zadania, w przekszałceniu tych zdań w passive voice. Za pomoc bardzo dziękuję.

1. Someone is cleaning the windows.
2. She tapped him on the hand with her pen.
3. Who made this mess?
4. Is Sue washing the car?
5. They sent for the doctor.

1. The windows are being cleaned.
2. He was tapped on the hand with her pen.
3. Who was this mess made by?
4. Is the car being washed by Sue?
5. The doctor was sent for. (chyba)