An old forklift is due for a replacement analysis. It has a current market value $$10,000.$ The market values and operation and maintenance costs for each of the remaining years of service are given below. The MARR is $10\%$ per year.

$($a$)$ Complete the table of marginal costs of the old forklift for each of the remaining years of service.

$($b$)$ If the challenger has a minimum EUAC of $$5,689,$ answer the two additional questions.

$\backslash$table$[[,$Forklift $($Defender$)],[$Year$,$MV at EOY,O&M Costs$],[1,$$$7,000,$$$3,000$