9. The initial margin requirement for writing a naked option is the premium plus 20% of the stock value plus any necessary adjustments for not being-at-themoney. Also assume the margin requirement for stock is 50%. An investor writes one (naked) put option. The option price is $4 at a strike price of $50 and a stock price of $52. What is the investor's net cash outflow when entering this trade? a. $640 b. $840 c. $1040 d. $1440 e. None of these numbers are correct