question 3 also get the ecpected return plea

The table given below reports last five years data on annual rates of return (HPYs) on two stocks Year Stock A (96 Stock B (9) 1 16 -10 2 24 0 3 40 30 4 10 40 5 -20 20 1. Compute the arithmetic mean of the annual rates of return for both stocks. Which stock is preferable using this measure 2. Compute the standard deviation for each stock Which stack is preferable by this measure 3. Compute the coefficient of variation for each stock By this measure which stock is preferable