IBM stock currently sells for 44 dollars per share. Over 5 months the price will either go up by 13 . 5 percent or down by -6.5 percent. The risk-free rate of interest is 7.0 percent continuously compounded. If you are short one call option with strike price 45 and maturity of 5 months, how many shares of stock must you buy to establish a delta-neutral position? \begin{tabular}{|l|} \hline 0.17 \\ \hline 0.20399 \\ \hline 0.56136 \\ \hline 0.12 \\ \hline 0.47298 \\ \hline \end{tabular}