Problem:
The current stock price of International Paper is $69, and the stock does not pay dividends. The instantaneous risk-free rate of return is 10%. The instantaneous standard deviation of International Paper's stock is 25%. You want to purchase a call option on this stock with an exercise price of $70 and an expiration date 73 days from now.
Required:
Using the Black-Scholes OPM, the call option should be worth __________ today.
Note: Explain all steps comprehensively.