Convert from active voice to passive voice and vice versa

I 1. They proved the case against him. 
2. They found the car later in the middle of Wales. 
3. Somebody had removed the numberplates. 
4. Somebody had seen him driving a mechanical digger. 
5. The police fined Mr and Mrs Dawn each 100 pounds.

II 1. What a dreadful noise! It sounds as if a pig is being killed by someone!
2. That old house will have to be pulled down.
3. The flight may have been cancelled. 
4. I always used to be woken up by by someone at 5.30 when I was in the army.
5. The post is delivered very early in the morning. 

Ta da

ok so like i went to wiki and looked up the (constitution x new "hammystan")and it showed me the picture it highlights new hampshire and says first and second session and than it says that they hit up the u.s and was like "ey dude that paper u sent us was adopted it bro thx" xd syays it all on wiki/the pic

i dont really like reading so i guess other people might not like reading either so   imma put the answer in bold italics

answer: 2 times i think