1. From a cube-shaped water tank, 64 buckets of equal size are removed, leaving the tank one-third full. If the side length of the tank is 1.2 meters, then how much water does each bucket hold in liters? (Assume: 1 cubic decimeter = 1 liter)

2. The English translation is: "A cube-shaped tank completely filled with water becomes \(\frac{1}{3}\) full after removing 64 equal-sized buckets of water. If the length of each side of the tank is 1.2 meters, how much water does each bucket hold (in liters)?"

3. A completely water-filled cubic tank becomes \(\frac{1}{3}\) full after removing 64 buckets of water. If the length of each side of the tank is 1.2 meters, how many liters of water does each bucket hold?

4. A tank measuring 21 decimeters in length, 11 decimeters in width, and 6 decimeters in depth is half-filled with water. If 100 solid spheres, each with a diameter of 21 centimeters, are submerged into the tank, by how many decimeters will the water level rise?

5. From a completely water-filled cubical tank, 75 buckets of equal size are taken out, after which \(\frac{2}{5}\) of the tank remains filled with water. If each edge of the tank is 1.5 meters long, how much water does each bucket hold in liters?