Q$1.$ In $2015,$ a new drilling machine costs $$20,000,$ and $$10,000$ is borrowed for $2$ years at a real interest rate of $12\%$ per year. The loan will be repaid by uniform annual payments. The company has realized a $20\%$ investment tax credit on this asset. Sum$-$of$-$Years$-$Digit depreciation over a $4-$year period is claimed, and the asset's salvage value at this time is expected to be $$5,000$ real dollars with respect to the base year $2015.$ Before$-$tax income from the asset is estimated to be $$6,000$ year in real dollars. In $2019,$ the firm sells the drilling machine for $$1000$ actual dollars. The firm's effective income tax rate is $20\%.$ Inflation and revaluation rates are forecasted to be $25\%$ and $15\%,$ respectively. If the base year is $2015$ and real after$-$tax MARR is $20\%,$ develop a current ATCF analysis and decide whether this investment is profitable.