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3a. By calculating how much energy is converted to stored chemical energy by the process of net photosynthesis each year on Earth. Assume the following: Global NPP = 110 GtCyr-1, organic C is stored in the form of simple carbohydrates(CH20), energy content of carbohydrates is 17 kJ/g. [Final answer in Watts] 3b. Global average rate of solar energy that reaches Earth's surface is about 175 W/m2. And what % of this solar energy is converted to stored chemical energy by NPP? 3c. What amount of energy is required to sustain human biomass on Earth? Assume there are 7 billion people on Earth, and each person consumes about 2000 kcal/day, 1 kcal = 4184 J. [Final answer in Watts). And what percentage of global NPP is this? 3a. By calculating how much energy is converted to stored chemical energy by the process of net photosynthesis each year on Earth. Assume the following: Global NPP = 110 GtCyr-1, organic C is stored in the form of simple carbohydrates(CH20), energy content of carbohydrates is 17 kJ/g. [Final answer in Watts] 3b. Global average rate of solar energy that reaches Earth's surface is about 175 W/m2. And what % of this solar energy is converted to stored chemical energy by NPP? 3c. What amount of energy is required to sustain human biomass on Earth? Assume there are 7 billion people on Earth, and each person consumes about 2000 kcal/day, 1 kcal = 4184 J. [Final answer in Watts). And what percentage of global NPP is this