A young investment manager tells his client that the probability of making a positive return with his suggested portfolio is 95%. If it is known that...

A young investment manager tells his client that the probability of making a positive return with his suggested portfolio is 95%. If it is known that returns are normally distributed with a mean of 5.8%, what is the risk, measured by standard deviation, that this investment manager assumes in his calculation? Use Table 1. (Round "z" value to 2 decimal places and final answer to 3 decimal places.)