Data for three alternatives are given in the table below. The fourth alternative is $$Do nothing.$$ Determine the best alternative using the incremental rate of return $($RoR$)$ analysis. MARR $=9\%.$

$123$

First cost $$20,500$ $$34,000$ $$26,000$

O &M Cost$/$ year $1,0001,7001,300$

Benefit$/$year $8,50013,0009,500$

Salvage value $2,5006,5005,500$

Life in years $444$