I don't understand this. Please thoroughly explain. Im trying to complete with paper and pencil. Please fully explain how I show calculate not understanding how. Trying to carry all calculations to two decimal places to reduce rounding error, especially in multi$-$step problems. a$.$ Calculate the average return over the four$-$year period for each of the three alternatives.

b$.$ Calculate the standard deviation of returns over the four$-$year period for each of the three

alternatives.

c$.$ Use your findings in parts a and $b$ to calculate the coefficient of variation for each of the three

alternatives.

d$.$ On the basis of your findings, which of the three investment alternatives do you think

performed better over this period? Why?