Explain, using Boyle's law, the volume change of an inflated balloon that a diver takes to a pressure of 2 atm?

I think that standard sea level pressure is 1 atm so taking the balloon below sea level to a pressure of 2 atm would indicate an increase in pressure and, therefore, a decrease in volume.

The reason why is because when you increase the pressure of the liquid molecules on the outside of the balloon, the gas particles bouncing around on the inside of the balloon are no longer strong enough to keep the balloon as inflated.  The increase in pressure on the outside would cause the balloon to partially deflate aka decrease in volume.