After drinking a lot of caffeinated Dr. Pepper, Forrest Gump is energized and successfully launches an invasion of the mythical nation of Oz and proclaims himself "President for Life." In the mythical nation of Oz, gasoline used to sell for $1 a gallon, and the natives purchased 100,000 gallons a week. After the invasion the price rose to $3 a gallon and the natives reduced their quantity demanded to 90,000 gallons a week. Calculate the elasticity of demand for gasoline in Oz. Is demand elastic or inelastic? How do you know? (2 points)