The chairman of the board of directors of Xerxes Corp. wrote a signed letter to Pablo, the president, who is 68 years old and planned to retire at the end of the year. "The corporation will pay you a pension of $100,000 a year for life if you retire as planned, and agree not to take another job in this industry." Pablo replied, "I promise to do as you wish." Two years later, Xerxes Corp. stopped the pension payments. Pablo sues Xerxes Corp. for the current installment. May Pablo recover?

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.