(10 pts] A waste that is 50% carbohydrates, 20% protein, and 30% fats (lipids) is feedstock for a composting operation. The feedstock was determined by elemental analysis to have the composition C21.1H38.6No.205.2. 378 kg of the feedstock yielded 42 kg of product (composition C8H14N0.050) after composting. a) Determine the stoichiometric amount of air (kg air/kg feedstock) needed for composting the waste. Air is 21% oxygen. (5 pts) b) If 1 mole of the same feedstock were to be processed by anaerobic digestion, calculate the kg of methane produced and kg CO2 produced. Assume that anaerobic digestion will convert 80% of the feedstock mass to gas. (5 pts)