What are the EARs for each of the stocks over this period

You have the following stocks to choose from: Stock B c D Shares Market Price Today MarketPrice 1 year ago $10,000.00 $ $50,000.00 $ $20,000.00 $ $ 500.00 $ 121.00 $ 10.00 $ 101.00 $ 3,000.00 $ 112.00 8.00 75.00 5,000.00 MarketPrice 2 years ago 70.00 7.00 80.00 4,000.00 MarketPrice 3 years ago 100.00 6.00 63.00 3,000.00 MarketPrice 4 years ago 80.00 5.50 56.00 2,500.00 Market Price 5 years Ago 70.00 5.00 55.00 2,000.00 What are the EARS for each of the stocks over this period? What is the Best, as measured by the Coefficient of Variation, 2 stock portfolio (if we assume the compounded rate of return over this period is the expected rate of return in the foreseeable future). EAR cv Best?