Question 5 (20 points) A software package created by Navarro & Associates can be used for analyzing and designing three-sided guyed towers and three- and four-sided self-supporting towers. A single-user license will cost $4,000 per year. A site license has a one-time cost of $15,000. A structural engineering consulting company is trying to decide between two alternatives: first, to buy one single-user license now and one each year for the next 4 years (which will provide 5 years of service); or second, to buy a site license now. Determine which strategy should be adopted at an interest rate of 12 % per year for a 5-year planning period, using the present worth method of evaluation. Don't buy either license Buy the single-user license Buy the site license Buy both licenses