4 years The following data are accumulated by Lone Peak Inc. In evaluating two competing capital investment proposals: 3D Printer Truck Amount of investment $40,000 $64,000 Useful life 5 years Estimated residual value 0 Estimated total income over the useful life $3,200 $12,800 Determine the expected average rate of return for each proposal. If required, round your answers to one decimal place, 3D Printer % Truck 0 90