Security Returns if State Occurs State of Economy Bust Boom Probability of State of Economy .30 .70 Roll -16% 27 Ross 20% 7 Calculate the standard deviations for Roll and Ross by filling in the following table: (A negative value should be indicated by a minus sign. Do not round intermediate calculations. Round your answers to 4 decimal places.) State of Probability of State of Economy Economy Return Deviation from Expected Return Squared Return Deviation Product Roll Bust Boom .30 .70 02 Ross Bust .30 Boom .70 -0.0390 0.0015 02 =