The Mass Rapid Transit (MRT) System in Hong Kong has been running significant losses. Transport Ministry officials have argued over whether to raise fares to combat the losses. One argument against a fare increase is that it will aggravate traffic congestion on the streets during peak commuter hours. Suppose that the current fare is $4 and the government is considering raising it to S6. Officials estimate that this reduces the number of rides purchased from 10,000 to 8,000 per day a) What is the estimated elasticity of demand for MRT rides using the midpoint/ARC method?
b) What does this elasticity of demand suggest to you about what will happen to total revenue earned by the transit system? Explain and show your work.

Problem 3: access control pokeygram, a cutting-edge new email start-up, is setting up building access for its employees. there are two types of employees: managers and engineers, and there are three departments: security, networking, and human resoures. each employee works in a single department, and each department is housed on a different floor. managers are allowed access to any floor, while engineers are allowed access only to their own floor. there are three badge-operated elevators, each going up to only one distinct floor. every employee has one badge. pokeygram wants to use the best possible access control method in order to minimize delay for the elevators (a) access control matrix, 1. which of the following would you recommend that pokeygram use: (b) access control lists, or (c) capabilities? make sure to justify your answer. 2. what, if any, would be the benefits (and/or disadvantages) of using rbac (role-based access control) in this situation? keep your solution for this problem limited to 10-12 lines of text.