Average Rate of Return The following data are accumulated by Lone Peak Inc. in evaluating two competing capital investment proposals: 3D Printer $88,000 4 years 0 $8,800 Truck Amount of investment Useful life Estimated residual value Estimated total income over the useful life Determine the expected average rate of return for each proposal. If required, round your answers to one decimal place. 3D Printer Truck $56,000 9 years $21,420