a. You are considering the following three securities listed below.

	Returns
Probability	Stock A	Stock B	Stock C
20%	2%	-3%	5%
50%	10%	8%	8%
30%	15%	20%	12%

Required:

i. Calculate the expected return for each security.

ii. Calculate the standard deviation of returns for each security.

iii. Compare Stock A with Stocks B and C. Is Stock A preferred over the others?