Suppose that call options on ExxonMobil stock with time to expiration 3 months and strike price $86 are selling at an implied volatility of 26%. ExonMobil stock price is $86 per share, and the risk-free rate is 5%. a. If you belleve the true volatility of the stock is 30%, would you want to buy or sell call options? Buy call options Sell call options b. Now you want to hedge your option position against changes in the stock price. How many shares of stock will you hold for each option contract purchased or sold? (Round your answer to 4 decimal places.)