The$$ S&P stock index represents a portfolio comprised of $500$ large publicly traded companies. On December$24,2007,$ the index had a value of$1,410$ and on December$24,2008,$ the index was approximately $879.$ If the average dividend paid on the stocks in the index is approximately $3\mathrm{.}5$ percent of the value of the index at the beginning of the$$ year, what is the rate of return earned on the$$ S&P index? What is your assessment of the relative riskiness of investing in a single stock such as Google compared to investing in the$$ S&P index$($recall from Chapter $2$ that you can purchase mutual funds that mimic the returns of the$$ index$)?$