The following table contains financial statement information for Walmart Inc. $ millions Total Assets Net Income Sales Equity 2018 $219,295 $6,670 $510,329 $72,496 2017 204,522 9,862 495,761 77,869 2016 198,825 13,643 481,317 77,798 a. Compute return on equity (ROE) for the two recent years. b. Compute return on assets (ROA) for the two recent years. c. Compute profit margin (PM) for the two recent years. d. Compute asset turnover (AT) for the two recent years. Round ROE, ROA and PM to one decimal place (example: 0.2345

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.