Your boss liked how you solved the Tricky Pearls problem and has now given you a new one.

You have 5 bags of pearls. You are told that each bag contains either all genuine pearls, or all fake pearls. Real pearls weigh 10 grams and fake pearls weigh 9 grams.

Armed with a very precise scale, how can you figure out which bags contains the fake pearls with the fewest number of weighings?