5. Jacob likes having his teeth cleaned by the dentist. When the price of a cleaning is $100, he receives 5 cleanings per year. (15 points total; 5 points each) a. Now suppose that the price of a cleaning rises to $150. With the new price, Jacob only b. receives 4 cleanings. What is J acob's arc price elasticity of demand for cleanings? Jacob demands 4 cleanings per year (from part a). Now suppose that Jacob gets demoted and receives a lower income. His income goes from $120,000 to $60,000. With his new income, he demands 2 cleanings at the price of $150. What is his arc elasticity of demand for cleanings with respect to income? Jacob demands 2 cleanings per year (from part b). Now suppose that J acob's annual rent falls from $30,000 per year to $18,000 per year. Since Jacob can spend less on rent, he now demands 3 dental cleanings per year instead of 2 dental cleanings per year at the price of $150. What is his arc cross-price elasticity of demand for cleanings with respect to rent