The demand function for DVD players has been estimated to be Q_Player = 134 - 1.07P_DVD + 46P_m - 2.1P_DVD - 5M, where Q_Player is the quantity of DVD players, P_DVD is the price of a videocassette, P_m is the price of a movie, P_Player is the price of a DVD player, and M is income. Based on this information, answer the following questions.
a. Are DVD players normal or inferior goods?
b. Are movies substitutes or complements for DVD players?
c. What additional information is needed to calculate the price elasticity of demand for DVD players?

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The Answer of The demand function for DVD players has been estimated to be Q_Player = 134 - 1.07P_DVD + 46P_m - 2.1P_DVD - 5M, where Q_Player is the quantity of DVD players, P_DVD is the price of a videocassette, P_m is the price of a movie, P_Player is the price of a DVD player, and M is income. Based on this information, answer the following questions. a. Are DVD players normal or inferior goods? b. Are movies substitutes or complements for DVD players? c. What additional information is needed to calculate the price elasticity of demand for DVD players?

The Demand Function for DVD Players Has Been Estimated to Be