Assuming an ethanol yield of 0.51 grams per gram of carbohydrate for both cellulose and hemicellulose, calculate the land requirements to produce 500,000 gallons/year of ethanol from the following...

Assuming an ethanol yield of 0.51 grams per gram of carbohydrate for both cellulose and hemicellulose, calculate the land requirements to produce 500,000 gallons/year of ethanol from the following biomass: switchgrass, Miscanthus, coastal bermudagrass, and poplar. (Note: clearly state all assumptions, and cite sources for data related to yields and composition.