Given the following time events and incremental cash flow, if the MARR is 12% per year, which alternative should be selected on the basis of rate of return? Assume alternative B requires the extra $7,000 initial investment. (You can use Excel). Year Incremental CFB-CFA 0 -7,000 1 +1,500 2 +1,500 3 +1,500 4 +1,500 5 +5,000