We know the following expected returns for stocks A and B, given different states of the economy:

State (s)	Probability	E(rA,s)	E(rB,s)
Recession	0.1	-0.02	0.01
Normal	0.5	0.13	0.04
Expansion	0.4	0.21	0.08

Part 3

What is the standard deviation of returns for stock A?

Submit

Attempt 1/10 for 10 pts.

Part 4

What is the standard deviation of returns for stock B?