The current stock price of Alcoa is $85, and the stock does not pay dividends. The instantaneous risk-free rate of return is 5%. The instantaneous standard deviation of Alcoco's stock is 25%. You want to purchase a put option on this stock with an exercise price of $90 and an expiration date 30 days from now. According to the Black-Scholes OPM, you should hold shares of stock per 100 put options to hedge your risk. O 37 O 41 0 76 O 81