3. Assuming a MARR of 20%, use incremental analysis (defender vs challenger approach) to select the best choice among the four alternatives assuming a useful life of eight (8) years for all alternatives: A D C B initial cost -2500 3600 4200 4800 annual benefit 850 1000 1200 1300 salvage value 2500 2500 3000 3000 useful life (yrs) 4. Use IRR and incremental analysis, assuming a MARR of 20%, to solve problem #3. 5. Use Benefit to Cost (B/C) ratio and incremental analysis to solve problem #3