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 $32,000 $64,000 Useful life 4 years 9 years Estimated residual value Estimated total income over the useful life $4,480 $34,560 Determine the expected average rate of return for each proposal. If required, round your answers to one decimal place. 3D Printer Truck