You have identified three alternatives for a small project at your plant. Any of the alternatives would save about $30,000 per year in operating costs. (a) Use AW analysis and an MARR of 15% per year to determine which alternative to select. Alternative Salvage Value, $ Annual Cost, $/year Life, years 40,000 4000 8000 3 50,000 6000 6000 4 60,000 9000 4000