2. Go to Yahoo Finance, and search for Microsoft (MSFT). Click on historical data tab, and pull the last 5 years of monthly stock return data into excel.
   1. What was the average (arithmetic) return for the past 5 years?
   2. What is the geometric return for the past 5 years?
   3. What is the variance and standard deviation of the monthly returns?
   4. What is the expected range of monthly returns we can expect to receive 68% of the time?