4. ( 2 pts. ) Suppose that the government decides to require all school children to wear helmets when playing dodge ball. Assume that 40 million school children play dodge ball and that 50% more...

4. (2 pts.) Suppose that the government decides to require all school children to wear helmets when playing dodge ball. Assume that 40 million school children play dodge ball and that 50% more children wear helmets now than had previously done so. Given this information, answer the following questions:

A. If 4/5 of the 50% increase is due to the enactment of the law, how many children would now be wearing helmets because of the law?

B. If 3,500 nosebleeds are prevented per year, what is the change in the annual risk of nosebleeds caused by the new law?

C. Assume the implicit value of a nosebleed is $100. What are the total benefits of the law?

D. If a dodge-ball helmet costs $10, what is the total cost of the program? Do the costs outweigh the benefits?