2. Unicom is a regulated utility serving Northern Illinois. The following table lists the stock prices and dividends on Unicom from 1989 to 1998. Year Price (dollars) Dividends (dollars) 1989 36.10 3.00 1990 33.60 3.00 1991 37.80 3.00 1992 30.90 2.30 1993 26.80 1.60 1994 24.80 1.60 1995 31.60 1.60 1996 28.50 1.60 1997 24.25 1.60 1998 35.60 1.60 d a. b. C. Estimate the average annual return you would have made on your investment. Estimate the standard deviation and variance in annual returns. If you were investing in Unicom today, would you expect the historical standard deviations and vari- ances to continue to hold? Why or why not?