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 $60,000 $20,000 Useful life 4 years 7 years Estimated residual value 0 0 Estimated total income over the useful life $5,400 $5,600 Determine the expected average rate of return for each proposal. If required, round your answers to one decimal place. 3D Printer Truck % %