4. Hillary has an initial endowment of $500 and is interested in two things: how many visits she can make to the doctor and how much money will be left over to spend on other things. When a trip to the doctor costs $40, Hillary sees the doctor 4 times. After health care reform, a visit to the doctor will cost $10 but her taxes will rise by $160. a. Explain what conditions are necessary for Hillary to be made better off by health care reform. b. Explain what conditions are necessary for Hillary to be made worse off by health care reform. c. Is it possible to tell whether Hillary has been made worse off with the given information