Average Rate of Return The following data are accumulated by Lone Peak Inc. in evaluating two competing capital investment proposals: 3D Printer Truck Amount of investment . $36,000 Useful life 5 years 4 years Estimated residual value 0 0 Estimated total income over the useful life $9,600 $10,800 Determine the expected average rate of return for each proposal. If required, round your answers to one decimal place. 3D Printer Truck