Suppose that for the first 3 months, you are in perfect health, with a utility of 1. Suppose that for the next 6 months, you have seasonal allergies, where your utility takes a value of 0.5. For the last 3 months, you have chronic obstructive pulmonary disorder (COPD). You don't directly know the utility of COPD, but the utility function is given by U = 1 - D^2 where D represents the value of the disease. In this case, COPD gives you a disease value of 0.9 (D= 0.9). Answer the following questions. a. (2.5 points) What is the value of your QALY? b. (2.5 points) Draw the QALY curve. c. (2 points) Why is QALY a better measure of health than life expectancy