Application of probability distribution in Project choice

The returns (%) of Project A (variable X) and Project B (variable Y) with respective probabilities are given in the tables below:

X	-3	4	8
Prob	0.20	0.50	0.30

Y	1	3	6
Prob	0.30	0.30	0.40

Q1. Calculate expected returns and standard deviations for two projects

Q2. Use results above, make your evaluation and justification for selection of project in terms of: return, risk and both of them