Calculate the durations and volatilities of securities A, B, and C. Their cash flows are shown below. The interest rate is 9%. (Do not round intermediate calculations. Round "Duration" to 4 decimal places and "Volatility" to 2 decimal places.) Period 1 Period 2 Period 3 Duration Volatility 70 70 100 years 50 50 180 years 40 40 170 years