Let c stand for consumption spending, i for investment, g for government purchases, x for exports, im for imports, di for disposable income, and nt for net taxes.
consider the following identity and answer the questions that follow.
c + i + g + (x - im) = di + nt
which of the following best characterizes the above identity?
a. national income must equal domestic product.
b. domestic product must exceed national income.
c. domestic product must equal the total amount of leakages from the nation's flow of income and expenditures.
d. domestic product must equal the total amount of injections into the nation's flow of income and expenditures.
true or false: imports must equal exports.
a. true
b. flase

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.