3) i) Calculate the average returns, variance and standard deviation for three securities X, Y and Z that have performed as follows. Returns % Year X Y Z 1 11 36 -3 2 6 -7 0 3 -8 21 5 4 28 -12 9 5 13...

3) i) Calculate the average returns, variance and standard deviation for three securities X, Y and Z that have performed as follows.

1. ii) Is there any basis for preferring one of these securities over the others?

iii) Calculate the covariances between X, Y and Z.