3. Because of a recent wave of jewellery store robberies, a city increases police surveillance of jewellery stores. The increased surveillance costs the city an extra $500,000 per year, but as a result, the amount of jewellery that is stolen falls. Specifically, without the increase in surveillance, jewellery with a retail value of $1 million would have been stolen. This stolen jewellery would have been fenced by the jewellery thieves for $600,000. a. What is the benefit of the police surveillance program? (Score =5) b. What is the cost of the police surveillance program? (Score = 10) c. What is the net social benefit resulting from the police surveillance program? Show the calculation. (Score = 10) 4. Assumed the government subsidies two kinds of goods, electricity and car. Explain the effect of the subsidy on price/quantity of each goods. Show by using the graph. (Score = 20)