6-5. Determine which of the independent (nonrepeating) investment opportunities in the accompanying table are economically worthwhile. Use a MARR of in study period of 5 years, and (a) the IRR method, (b) the ERR method. Cash flows for investment opportunity B C D E EOY A F 0 1 -$10,000 2 ,000 2.000 2,000 3.000 3.000 $5,000 1,000 1,500 2,000 2.500 0 $8,000 3,000 3,000 5,000 0 0 $12,000 5,000 5,000 6,000 $6.000 1,000 1,500 2,000 2,500 3.000 -$15.000 4,500 4,500 4,500 4,500 0