Suppose valerie is choosing how to allocate her portfolio between two asset classes: risk-free government bonds and a risky group of diversified stocks. the following data shows the risk and return associated with different combinations of stocks and bonds. combination: abcde fraction of portfolio in: 0255075100 diversified stocks (percent) average annual return: 1.503.505.507.509.50 (percent) standard deviation of: 05101520 portfolio return (risk) (percent) suppose valerie modifies her portfolio to contain 50% diversified stocks and 50% risk-free government bonds; that is, she chooses combination c. the average annual return for this type of portfolio is 6.5%, but given the standard deviation of 10%, the returns will typically (about 95% of the time) vary from a gain of to a loss of a) -14.5%; -14.5% b) 1.1%; -4.5% c) 15.5%; 1.1% d) 25.5%; 25.5%