Passive voice

Rewrite the following passage in the Passive.

Задание 1

My uncle painted this picture. Someone has offered him a lot of money for it. He will deliver the painting tomorrow. When they give him the money, he will tell them the truth. He painted it one night while he was sleep walking!

Задание 2

Some people saw a UFO in the sky above London last night. They reported it to the police. The army sent a helicopter to look at it more closer. The UFO shot the helicopter down and killed both men in it. People have given photographs of the UFO to the police. Experts are looking at them now.