A small water catchment has three activities nested within it, each requiring water for their operations. The water demands from the three activities are 100 m³/year, 150 m³/year, and 250 m³/year. The areas of their sites are 30 hectares, 20 hectares, and 50 hectares, respectively. The water supply available in the small catchment is 1000 m/year. Allocate the capacity of the catchment to the three activities in proportion to their demand and land area.