What is the beta of a portfolio if -22% of the funds are invested in a risk-free asset and the balance of the funds is invested in the market portfolio? The expected return and the standard deviation of the market portfolio are 15% and 25%, respectively. The risk-free rate is 4%. (Note: please retain at least 4 decimal places in your calculation and at least 2 decimal places in your final answer.) The portforlio's beta is