A hemispherical tank of radius 2 feet is positioned so that its base is circular. How much work is required to fill the tank with water through a

A hemispherical tank of radius 2 feet is positioned so that its base is circular. How much work is required to fill the tank with water through a hole in the base when the water source is at the base? (The weight-density of water is 62.4 pounds per cubic foot.)