If it is like in the United States, you have no rights. You are to do what you are told. Sit down, shut up, follow the judge's and bailiffs instructions.
You have one power; that is called, in the U.S., "jury nullification". YOU are the final judge of both the facts and the LAW. If YOU determine that the law someone is charged with violating is unjust, arbitrary, unconstitutional, you have the DUTY to vote the defendant NOT GUILTY, even if he violated the faulty law.
It is YOUR decision. If you can't convince the other jurors, hold out and hang the jury. Good luck.