4. (10 points) Assume that the demand for cosmetic or plastic surgery is price inelastic and and the absolute value of price elasticity is less than 1 and greater than zero and that plastic surgery follows the law of demand. Are the following statements true or false? Please give an explanation in each case.

a. When the price of plastic surgery increases, the number of operations decreases_ b. The percentage change in the price of plastic surgery is less than the percentage change in quantity demanded. c. Changes in the price of plastic surgery do not affect the number of operations. d. Quantity demanded is quite responsive to changes in price. e. If more plastic surgery is performed as a result of a fall in price of plastic surgery, total expenditure on plastic surgery will decrease