A manufacturer, whose MARR is 8%, is considering two alternative plant layouts, A1 and A2. The first cost represent the expenses of rearranging the current layout to the alternative new layout and the annual savings represent the reduction in the production costs of the new layout compared to the current layout. Using the internal rate of return as the decision criterion, what course of action do you recommend? Year A1 A2 First Cost 0 $120,000 $130,000 Annual Savings 1 to infinity $11,000 $14,500

Employees at a library check out books to patrons. books have an isbn and a name. the library sometimes has multiple copies of the same book. books have one or more authors. a patron is an individual who has an active (non-expired) library card. for each library card, we store the person's first and last names and their address. for each employee, we store their employee id, current salary, first and last name and their address. we also store the employee id of their current manager. each time we check out a book to a patron we need to store the date of the transaction, the employee who checked out the book to the patron, and the library card of the patron. some employees have library cards. if an employee patron turns in a book late, the fine that they pay is a percentage of their salary. some employees are authors who have library cards—they are allowed to check out as many books as they like.