(Solved): In a single-index model, the following table gives the expected returns, alphas (), standard devi ...

In a single-index model, the following table gives the expected returns, alphas $(?)$, standard deviation $(?)$, beta $(?)$ and firm-specific standard deviation $\left({?}_{?}\right)$ for the market, the risk-free asset, the three stocks A, B and $C$, all in annualized terms. Find the expected return of Asset $A$. \begin{tabular}{l} $10\%$ \\ \hline $12.5\%$ \\ \hline $15\%$ \\ $5\%$ \end{tabular}