Average Rate of Return The following data are accumulated by Green Apple Motors Inc. evaluating two competing capital investment proposals: Testing Equipment Diagnostic Software Amount of investment $28,000 $68,000 Useful life 4 years 7 years Estimated residual value $0 $0 Estimated total income over the useful life $4,480 $24,990 Determine the expected average rate of return for each proposal. If required, round to one decimal place. Testing Equipment % Diagnostic Software %