4. 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 MARR of 15% per year to determine which alternative to select. (Use Excel) Alternative F G H Initial Cost, $ 40,000 50,000 60,000 Salvage Value, $ 4000 6000 9000 Annual Cost, $/year 8000 6000 4000 Life, years 3 4 5