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 $64,000 $84,000 Useful life 4 years 7 years Estimated residual value Estimated total income over the useful life $7,040 $23,520 Determine the expected average rate of return for each proposal. If required, round your answers to one decimal place. 3D Printer Truck