Please help!!

1. Background: This problem deals with the US market for gasoline. Most of the buyers are consumers. They buy from gas stations, but it is better to think of the sellers in the models below as gasoline producers, about 130 refining firms. (We ignore the gas stations since they are intermediaries that add less than 5.05 to consumers' cost per gallon.) The main input in the production of gasoline is oil, about one gallon of oil for cach gallon of gasoline. In May 2010, US consumers bought 46Mg/d (Mg/d = million gallons per day) of gasoline at an average price of $2.84/gal. In May 2011, they bought 41.2Mg/d at an average price of $3.91/gal. a. [6] Suppose this change was a slide along the consumers' demand curve for gasoline, with no shift in the curve. Draw a possible monthly gasoline demand curve for US consumers during that period. Label the orgin and a price of $1/gal on the vertical axis and a quantity of 20Mg/d on the horizontal axis. Label the points on the demand curve that correspond to the prices and quantities given above. b.[4] Estimate US consumers' price elasticity of monthly demand for gasoline during the 2010 and 2011 under the assumption in part a. Was the demand elastic? c.[10] In your graph of part a draw likely shapes and locations of the US gasoline refiners' PMC curves and supply curves in May 2010 and May 2011. Use the arguments in the slides on supply to explain why the shapes and locations you drew are likely. What is the most likely reason for the shift in the PMC curve from 2010 to 2011? What data could help explain the shift? For 3 extra points, find relevant data and explain why it is relevant. d.[3] In November 2019, US consumers bought 23.9Mg/d of gasoline at an average price of $2.60/gal. In April 2020, they bought 12,4My/d at an average price of $1.84/gal. Give a reason to believe that this change was not a slide along a single demand curve. e. [8] Use the information in part d to draw in a single graph likely shapes and locations of US monthly demand and supply curves for gasoline in 11/19 and 4/20. Draw shapes like the ones you drew in parts a and c (the locations may be different). Label the prices and quantities where the demand and supply curves for each given month cross each other. Explain why the shifts in demand and/or supply that you drew are reasonable, given what we know about that period. f.[5 extra credit] In November 2020. US consumers bought 19Mg/d of gasoline at an average price of $2.20/gal. In August 2021, they bought an estimated 22.5Mg/d at an average price of S3.25/gal. Some people have claimed that policy changes since 1/21 that restrict oil drilling licenses on federal land and in the Arctic and proposals to limit fracking are important reasons for the price rise. What do the answers to parts a through e suggest about that claim? Explain