Problem:
The last four years of returns for a stock are as follows:
Year 1: -4.5%
Year 2: +27.7%
Year 3: +11.9%
Year 4: +4.2%
a. What is the average annual return?
b. What is the variance of the stock's returns?
c. What is the standard deviation of the stock's returns?
NOTE: Notice that the average return and standard deviation must be entered in percentage format . The variance must be entered in decimal format