2. Using annual worth analyses, with an interest rate of 12% per year, which of the following two alternatives (X and Y) is more economical? Initial cost ($) Annual Operating cost (S/year) -2000 -3000 -500 -500 in the first 5 (from year 1 to years, then -300 ___year 10 in years 6 to o 700 - 1000 Salvage Value (S) Life (years)