Matt Sanders, a financial analyst for Yellow Industries, wishes to estimate the rate of return for two similar$-$risk investments, X and Y$.$ Matt$$s research indicates that the past returns will serve as reasonable estimates of future returns. A year earlier, investment X had a market value of $$20,000,$ and investment Y had a market value of $$55,000.$ During the year, investment X generated cash flow of $$1,500,$ and investment Y generated cash flow of $$6,800.$ The current market values of investments X and Y are $$21,000$ and $$55,000,$ respectively. a$.$ Calculate the expected rate of return on investments X and Y using the most recent year$$s data. b$.$ Assuming the two investments are equally risky, which one should Matt recommend? Why?