An investor is considering a project that will generate $900,000 per year for four years. in addition to upfront costs, at the completion of the project at the end of the fifth year there will be shut-down costs of $400,000 . if the cost of capital is 4.4%, based on the mirr, at what upfront costs does this project cease to be worthwhile? a) $2.62 millionb) $3.21 millionc) $2.91 milliond) $3.50 million

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.