What is the Portfolio Beta if you hold positions in the following stocks displayed in this format (Current price per share, # of shares in our portolio, Beta for each stock) 230 shares, 224 betar): \begin{tabular}{r} 1.79 \\ 1.71 \\ 219 \\ \hline 1.57 \\ 1.90 \\ \hline 1.71 \\ 1.98 \end{tabular}