Problem No. 7 Five mutually exclusive revenue alternatives that have infinite lives are under consideration for in- creasing productivity in a manufacturing opera tion. The initial costs and cash flows of each project are shown. If the MARR is 14.9% per year which afenative should be selected? (using Exce) Alternative Initial cost, $ 7,000 -23,000 -9,000 -3,000 -16,000 Cash flow, S per 1,000 3,500 1,400 500 2,200 14.3 15.2 15.6 16.7 13.8 year Rate of return (vs DN), %