Calculate the durations and volatilities of securities A, B, and C. Their cash flows are shown below. The interest rate is 7%. (Do not round intermediate calculations. Round "Duration" to 4 decimal places and "Volatility" to 2 decimal places.) Period 1 105 A Period 2 105 85 75 Answer is complete but not entirely correct. Period 3 Duration Volatility 170 1.000.0000 years 30.64 250 1.000.0000 years 77.78 240 1.0000 years 77.78 85 75