Consider a forested watershed in which evapotranspiration removes about 50% of the annual rainfall and there are no losses of water to groundwater. A scientist makes the following observations: Precipitation: Amount: 100 cm/year Mg concentration: 0.05 mg/ Stream water: Volume 1.5 x 10 1/year Mg concentration: 0.40 mg/1 Bedrock: Al concentration: 10 g/kg Weathering rate: 800 kg/ha/year Al/Mg ratio: 5 Diagram the Mg cycle in this system, expressing the inputs and outputs in terms of kilograms per hectare (10,000 m) per year. Assuming all these measurements are accurate, how might you explain the small discrepancy this scientist encounters in the budget for Mg?