Amy owns $10,000 worth of PV Enterprises (PVE) stock. PVE has a standard deviation of 24 percent and a beta of 3.0. She wants to invest another $20,000 and create a $30,000 portfolio that is as risky as the overall market. Which one of the following will accomplish her goal? invest the additional $20,000 in a stock that has a standard deviation of 4 percent sell PVE and invest $20,000 in risk-free securities and $5,000 in a stock that has a standard deviation of 4 percent invest the additional $20,000 in risk-free securities O none of the choices are correct o invest the additional $20,000 in a security that is as risky as the market