Consider the following securities: What is the expected return of a portfolio that has invested $10 in Stock A and $60 in a risk-free asset? The risk-free rate of return is 2%. \begin{tabular}{|l|} \hline 7% \\ \hline 3.34% \\ \hline 13.7% \\ \hline 12% \\ \hline \end{tabular}