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Suppose the quantity demanded for GPS is 20 when the price is $160, and 30 when the price is $140

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Suppose the quantity demanded for GPS is 20 when the price is $160, and 30 when the price is $140. Answer the following questions.

a. When going from a price of $160 per unit to a price of $140 per unit, what is the price elasticity of demand of GPS units?

b. When going from a price of $140 per unit to a price of $160 per unit, what is the price elasticity of demand of GPS units?

c. Using the midpoint formula, what is the midpoint price elasticity of demand of GPS units between a price of $140 per unit and a price of $160 per unit?