Delta sonic, a chain of full service automotive detailers, is considering introducing a new 15-minute car wash and wax service at one of its locations. the firm expects that sales from the new 15-minute service will be $175,000 per year. delta sonic currently offers a 1-hour wash/wax/detail service with annual sales of $90,000. while many of the 15-minute sales will be to new customers, delta sonic estimates that 40% of their 1-hour customers will switch and use the 15-minute service. the level of incremental sales associated with introducing the new 15-minute wash/wax service is closest to a. $70,000 b. $36,000 c. $175,000 d. $85,000 e $139,000

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.