A rectangular tank measuring 1.2m by 0.4m by 0.2m is filled with water up to 4/5 of its height. A pail with a capacity of 1.3 litre is used to scoop water out from the tank. If no water is lost during the process, find
(a) the maximum number of 1.3 litre-pails that are fully filled.
(b) the amount of water that is left in the tank.