Mr. Samad can invest in GHB stock or KYM stock. His projection of the returns on these two stocks is as follows:

State	Probability	Return on GHB (%)	Return on KYM (%)
Bust	0.25	-2.0	5.0
Normal	0.60	9.2	6.2
Boom	0.15	15.4	7.4

Required:

1. Calculate the expected return of each stock
2. Calculate the standard deviation of return of each stock
3. Calculate the expected return on the portfolio if Mr. Samad invested 40% in GHB and 60% in KYM.
4. Calculate the standard deviation on the portfolio.