Carpenters Company, a manufacturing company, acquired equipment on January 1, 2017 for $510,000. Estimated useful life of the equipment was seven years and the estimated residual value was $18,000. On January 1, 2020, after using the equipment for three years, the total estimated useful life has been revised to nine total years. Residual value remains unchanged. The company uses the straight-line method of depreciation. Calculate the depreciation expense for 2020.

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.