4) You bought a put option on XYZ. Right now XYZ is trading at $100, the option is worth $5, A = .45 and I' = .04. A second later XYZ trades at $100.4 a) How would you estimate the new price for the option? b) How would you estimate the new A? c) What trade do you have to make to be hedged (to be delta neutral). d) Because of that move from $100 to $100.4 have you made or lost money? (Or, better said, what would you need to check to know whether you have made or lost money?)