Suppose the demand curve for a product is given by Q = 300 − 2P + 4I, where I is average income measured in thousands of dollars. The supply curve is Q = 3P − 50. a. If I = 25, find the market-clearing price and quantity for the product. b. If I = 50, find the market-clearing price and quantity for the product. c. Draw a graph to illustrate your answers.