Cinema tickets cost $15 each. Over a period of three months average weekly sales of cinema tickets increased from 300 to 309. Official statistics show that from the start of this period consumer's incomes increased by 4%. Which of the following is correct? Select one: O a. Income elasticity of demand equals 0.75 O b. Price elasticity of demand equals 3.75 O c. Income elasticity of demand equals 0.27 O d. Income elasticity of demand equals 0.44 O e. Price elasticity of demand equals -3.75 Of. Income elasticity of demand equals -0.27