3. draw the world fresh water budget storage volumes of ground water, rivers and lakes and atmospheric water (above) to scale where total volume is converted to an excel cell. scale each cell to 1 cell 12,900 km3. (you may also do this in an illustration program if you have the skills.) color each cell for each of the 3 systems and put a running total for each cell so that the total is the bottom right cell. how many cells are required for each reservoir of water? what is the error in each total if you can't use partial cells?