Rewrite the sentences in Reported speech.

1)"Avatar has spectacular special effects," he said.
2) "Can we make the characters look more realistic?" she asked.
3)"We used state-of-the-art technology to create the film," they said.
4) "Who are the main characters in the film?" David asked me.
5)"Do you think the film will be a box office hit?" she asked him.
6) "We need to improve computer technology further," the scientist says.