there's a 48.50% probability of a below average economy and a 51.50% probability of an average economy. If there is a below average economy, stocks A and B will have returns of -6.44% and -3.93%, respectively. If there is an average economy, stocks A and B will have returns of 5.09% and 15.46% respectively. Compute the following for stocks A and B

a) Stock A expected return

b) stock be expected return

c) Stock A standard deviation

d) Stock be standard deviation