Average Rate of Return The following data are accumulated by Watershed Inc. in evaluating two competing capital investment proposals Project A Project Z Amount of investment $80,000 $56,000 Useful life 4 years 9 years Estimated residual value 0 Estimated total income over the useful life $11,200 $28,980 Determine the expected average rate of return for each project. Round your answers to one decimal place. Project A 2,800 X % Project Z 3,220 X % Feedback Check My Work Divide the estimated average annual income by the average investment. Investment cost plus estimated resid