Movie theaters use both time of day and individual characteristics like age to segment consumers, even though the cost of the movie is the same across segments. Suppose a movie theater determines that the elasticity of demand for movie tickets is -2.0 for senior citizens and -1.5 for adults under age 65.Use the Lerner index to determine the ratio of prices between adults and seniors. In percentage terms, how big a price premium should be charged to the group that pays the higher price?