What is the total percentage return for an investor who purchased a...

What is the total percentage return for an investor who purchased a stock for $5.92, received $2.38  in dividend payments, and sold the stock for $9.51?

 Q2)   A stock had the following annual returns:     

16.29%, -12.04% , 02.39%, and 12.12%.

           What is the stock's:    a) expected return?

           What is the stock's:    b) variance?

           What is the stock's:    c) standard deviation?

Please show steps.

Round your answer to the nearest 2 decimal places (for VARIANCE round to 4 decimal places). If you need to use a calculated number for further calculations, DO NOT round until after all calculations have been completed. For the final answer, Round to 2 decimal places (for VARIANCE round to 4 decimal places).