Two mutually exclusive design alternatives are being considered for purchase. Doing nothing is also an option. The estimated cash flows for each alternative are given below. The MARR is 10% per year. Using the PW method, which alternative, if either, should be recommended? Capital Investment Annual Revenues Annual Expenses MV at end of useful life Useful Life IRR Alternative 1 $15,000 $8,000 $2,900 $2,000 4 years 17.2% Alternative 2 $23,000 $12,000 S3,000 $800 12 years 38.4%