Ребят, кто в британском шарит, помогите плииииз)Надобно конвертировать предложения в косвенную

Ребят, кто в британском шарит, помогите плииииз)
Надобно конвертировать предложения в косвенную речь:

1) I bought a new hi-fi system yesterday, Carl said.
2) I can't find my headphones, Laura said.
3) The zoom lens is broken, Micael said.
4) We will have finished our research paper by the end of this term, students said.
5) The signal has been very poor today, Joan said.
6) I think the batteries are flat, Paul said.
7) You should scan your computer for viruses, Patrick said.
8) It's not under guarantee, the shop assistant said.