3. Harley worked for many years to save enough money to start his own residential landscape design business. The cash flows shown are those he recorded for the first 6 years as his own boss. Find the external rate of return using the modified rate of return approach, an investment rate of 15% per year, and a borrowing rue of 8%. (After using the procedure, use the MIRR function to confirm your answer.) Year 1 0 1 2 3 4 5 6 NCE, S -9000 +4100 -2000 -7000 +12,000 +700 +800