New Wave is considering investing in the security market. The company needs to choose only one of the two securities listed below. The return is as follows: Probability Return Security A Security B 40% 10% 7% 20% 8% 10% 40% 4% 5% Based on the above information, you are required to: calculate the expected rate of return for each security. calculate the standard deviation of return for each security. explain the most preferable security