Engineering Economy and Management Homework (3) 1) Determine the rate of return for the cash flows shown in the diagram. Show both hand and spreadsheet solutions. $7000 8 Year $90 $90 $90 $200 $200 $200 $3000 2) Determine the rate of return for the cash flows shown in the table below. Show both hand and spreadsheet solutions. Year Expense, $ -17,000 -2,500 -2,500 -2,500 -2,500 -2,500 Revenue, S 0 5,000 6,000 7,000 8,000 12,000