There is 23.30% probability of a below average economy and a 76.80% probability of an average economy. If there is a below average economy stocks A and B will have returns of -0.50% and 4.20%, respectively. If there is an average economy stocks A and B will have returns of 12.60% and -2.90%, respectively. Compute the:

a) Expected return for stock A?

b) Expected return for stock B?

c) Standard Deviation for stock A?

d) Standard Deviated for stock B?