Jerome J. Jerome is considering investing in a security that has the following distribution of possible one year return.

Probability of accurrnce 0.10 0.20 0.30 0.30 0.10

Possible return -0.10 0.00 0.10 0.20 0.30

a) What is the expected return and standard deviation associated with the investment.

b) Is there much "downside" risk? How can you tell?