Compute the returns for each of the final four years

Question

Consider the following information

                    1998     1999      2000    2001     2002*
Year end 
Stock Price    15.15    17.10    21.00    20.05    11.05

Year end
Dividend         0.15     0.15      0.18      0.18      0.10

* In 2002, there was a 2 for 1 stock split

a. Compute the returns for each of the final four years, the holding period return, and the annualized return.

b. Compute the standard deviation of returns.