In Gotham City, the governor arranges the outdoor "Batman \& Joker celebrity events". The level of Efficient Output or Q * will occur at point E where Marginal Social Cost (MSC) = Marginal Social Benefit (MSB). This point is said to Maximize the difference between Total Social Benefit (TSB) and Total Social Cost (TSC) as shown in the left diagrams below. Meanwhile, the right table shows Total Social Cost and Total Social Benefit of the events which vary with the number of the shows. What is the socially efficient number of the events? explain