Mr. Buffetts entire portfolio contains shares of Apple (25%), Kraft (43%), and Verizon. Using the information in the table below, the standard deviation of Mr. Buffetts portfolio is ____________.

State of Economy Probability of State of Economy .83 .17 Return if State Occurs Apple Kraft Verizon 11.40% 4.80% 13.80% 18.70% 26.70% 18.20% Normal Boom 1.69% 2.26% 5.94% 6.93% 4.75%