A portfolio consists of only the market portfolio (with an expected return of 14% and a standard deviation of 15.4%) and the risk-free asset. The risk-free rate is 4.5%. If the target standard deviation of this portfolio is 12%, what is the weight for the risk-free asset? The weight for the risk-free asset is % Note: Please retain at least 4 decimal places in your calculations and at least 2 decimal places in your final