Change these statements into indirect speech

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I. Change these statements into indirect speech .
1. “I don't know how to do this exercise.“ John said
2. "I hope it won't rain tomorrow " My mother said
3. "I have finished studying my lesson. " said David .
4. “New York is bigger than London " Tom said .
5. “We must leave now ." Mr. Quan said
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6. “I'm going away tomorrow , mother " he said to his mother
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7. “It is so foggy today. " My father said
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8. "We can see the Eiffel Tower from the window of this hotel ." he said
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