4. (5 points) Which good, vaccinations or hamburgers, provides a positive externality? Please explain. Vaccinations. Now with COVID if a lot of people gets vaccinated and it will benefit the community overall, because we will protect each other with it. (b) Why does the government subsidize (pay for) vaccinations but does not subsidize the purchase of hamburgers? Please explain. Because the government needs to provide health to people and hamburgers are not good if you eat them every day. 5. (5 points) (a) Is the road system in a city excludable? Please explain. Yes, because with GPS technolog and inexpensive payment transponders such as 15-2 Pass the owners or operators of a road can use detailed pricing that accounts for time, congestion, and weight of the vehicle. Fines or charges can be casily automated using cameras and computerized billing (b) Is the road system in a city rival? Please caplain. No, it actually helps to have roads because they serve the traffic and zoning which in a city there is always going to be traffic, (c) Why does the government have to build and maintain city roads ( why won't private companies do it)? Please explain. Because is the governments job. With all the taxes that fluzone pay it is their job to build and maintain city roads