An Oil refinery can buy two types of oil: light crude oil and heavy crude oil. The cost per barrel of these type is respectively 11 dollars and 9 dollars. The following quantities of gasoline, kerosene, and jet fuel are produced per barrel of each type of oil GASOLINE KEROSENE JET FUEL Light crude oil 0.4 0.2 0.35 Heavy crude oil 0.32 0.4 0.2 The refinery has contracted to deliver 1 million barrels of gasoline, 400000 barrels of kerosene, and 250000 barrels of jet fuel. Formulate the problem of finding the number of barrels of each crude oil that satisfies the demand and minimzes the total cost as a linear program