Is this correct usage of reported speech?

Change the sentences into reported speech

1. Who did it? - They wondered who had done it
2. Did he steal the jewellery? – I doubted that he had stolen the jewellery
3. How much money have you got?-he asked me. He asked me how much money I had got.
4. Is this your daughter walking along the road, Mary? He asked Mary if it was her daughter walking along the road.
5. She said “It may rain” – She said it might rain.
6. She said “What time shall they leave?” - She asked when they should leave
7. He said “shall I help you” – He asked if he should help me
8. He said “They are late. They must have got lost” – He assumed they must had got lost because they were late.
9. He said “I can come soon” – He said that he could come soon
10. He said “you needn’t hurry” – He said I didn’t need to hurry