Помогите сделать английский =)=)

Reported Speech. Coose the correct variant us reported speech for each sentence.
"I'm waiting for my parents,"- Nick said.
Nick said he is was waiting for my parents.
Nick said he was waiting for his parents.
Nick said he was waiting for my parents.
Nick said he was waiting for his parents.
2. " I can not fix the engine myself," hey brother admitted.
My brother admitted that can`t fix the engine myself.
My brother admitted that canedn`t fix the engine myself.
My brother admitted that can`t fix the engine myself.
My brother admitted that could`t fix the engine myself.
3. "You should be careful," my friend said to me.
My friends said to me that I should be careful.
My friends said to me that I should have been careful.
My friends told me that I should have been careful.
My friends told me that I should be careful.
4. "I'll will come tomorrow and finish the work," the plumber said to grandma.
The plumber said the grandma that he will come tomorrow and finish the work.
The remember promised grandma that he will come the next day and finish the work.
The plumber promised grandma that he would come next day and will finish the work.
The plumber promised grandma that he would come the next day finish the work.
5. "The sun isn`t a planet, it is a big star," the teacher explained.
The teacher explained to us that the sun is a big star.
The teacher explained us that the sun is big a star.
The teacher explained us that the sun was a big star.
The teacher explained to us that the sun was a big star.