What is the standard deviation of the returns on a $30,000 portfolio that consists of stocks S and T? Stock S is valued at $21,000.

State of Economy	Probability of State of Economy	Return if State Occurs
		Stock S	Stock T
Boom	5%	11%	5%
Normal	85	8	6
Recession	10	-5	8

3.36 percent

2.07 percent

2.61 percent

3.63 percent

3.49 percent