A coffee shop owner would like to create a blend of cinnamon and hazelnut flavored coffee that sells for $ 8.00 a pound. Currently, the cinnamon coffee sells for $ 6.00 per pound and the hazelnut coffee sells for $ 9.00 per pound. Which of the following systems of equations could be used to determine the amount c , in pounds, of the cinnamon flavored coffee, and the amount h , in pounds, of the hazelnut flavored coffee, that should be mixed to obtain 20 pounds of the desired blend?