Answer and Explanation:
The computation of ROI for each year of the asset's life and residual income each year is shown below:-
Year Investment base ROI Residual income
1 $2,950,000 8% -$233,500
2 $2,212,500 11% -$233,500
3 $1,475,000 17% -$115,500
4 $737,500 34% -$56,500
ROI = Net income ÷ Total investment × 100
Net Income = Cash flow - Depreciation
Residual income = Net income - (Investment × Cost of capital)
Depreciation = Investment base ÷ 4 years
The return on investment and the residual income can be find out by using the excel spreadsheet. Kindly find it in the attachment