Answer the questions based on the figure provided below.

(1) What is the price when the demand for milk is 1 liter?
(2) What is the demand for milk when the price is 3 rupees?
(3) What is the relationship between the demand for milk and its price?
(4) If the price is increased from 5 rupees to 3 rupees, how much will the demand for milk change?
(5) If the demand for milk is reduced from 3 liters to 1 liter, how much will the price change?