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 $56,000 $68,000 Useful life 4 years 5 years Estimated residual value 0 0 Estimated total income over the useful life $5,600 $13.600 Determine the expected average rate of return for each project. Round your answers to one decimal place Project A % Project Z %