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	-0.01	0.04
Normal	0.5	0.14	0.07
Expansion	0.4	0.22	0.11

Part 1

What is the expected return for stock A?

Part 2

What is the expected return for stock B?

Part 3

What is the standard deviation of returns for stock A?

Part 4

What is the standard deviation of returns for stock B?