(Portfolio beta and CAPM) You are putting together a portfolio made up of four different stocks. However, you are considering two possible weightings: a. What is the beta on each portfolio? b. Which portfolio is riskier? c. If the risk-free rate of interest were 5 percent and the market risk premium were 6.5 percent, what rate of return would you expect to earn from each of the portfolios? \begin{tabular}{crcc} & \multicolumn{2}{c}{ Portfolio Weightings } \\ Asset & Beta & First Portfolio & Second Portfolio \\ A & 2.20 & 12% & 38% \\ B & 1.05 & 12% & 38% \\ C & 0.60 & 38% & 12% \\ D & 1.70 & 38% & 12% \\ \hline \end{tabular}