Economics homework help! I don't need just an answer if you could explain how to solve these types of problems?

The Economics in Practice in this chapter describes the adjustment of the corn and wheat market in the United States to federal mandate requiring refiners to use​ corn-based ethanol in the production of fuel. Up until January​ 2012, refiners were given a subsidy of​ $0.45 for every gallon of ethanol they blended... show more The Economics in Practice in this chapter describes the adjustment of the corn and wheat market in the United States to federal mandate requiring refiners to use​ corn-based ethanol in the production of fuel. Up until January​ 2012, refiners were given a subsidy of​ $0.45 for every gallon of ethanol they blended into their fuel. This subsidy drove up the prices of other agricultural products such as wheat and substantially raised the value of farmland. Assuming the subsidy was still in​ place, what would happen to the prices of these other agricultural goods and to the value of farmland if oil prices were to fall extensively at the same​ time? Trace these changes in the economy using supply and demand curves. Assume a given ethanol production subsidy.
Show how the market for corn would be affected​ (given the ethanol production​ subsidy) if oil prices were to fall.
​1.)  Using the line drawing tool​, draw either a new market supply curve ​(Upper S 2​) or new market demand curve ​(Upper D 2​). Properly label your curve.
​2.)  Using the point drawing tool​, indicate the new market equilibrium​ (Equilibrium). Properly label your point.
​Note: Carefully follow the instructions above and only draw the required objects.  
At the same​ time, if oil prices fall​, then the demand for land will ____,____ land prices.

​Further, if oil prices fall​, then the wheat demand supply curve will shift to the ___

This will ____wheat prices.
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