1. The roles of money Brian is heading out to lunch. He goes to the bank and withdraws $30 from his savings account. He heads to a local deli that sells half sub sandwiches for $4.99 and whole subs for $7.99. Brian decides that he's pretty hungry and goes for the whole. He pays with a $10 bill and tells the cashier to keep the change. Identify what role money plays in each of the following parts of the story. Hint: Select each role only once. Role of Money Medium of Exchange Unit of Account Store of Value Brian can easily determine that the whole sandwich, while twice as long as the half, is priced at less than twice as much. Brian accumulates money in his savings account for future purchases. Brian buys his lunch with a $10 bill.

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.