At an annual continuously compounded interest rate of 5%, the 15-months 10-strike and 20-strike call option premiums for a stock are $5.6700 and $0.5553, respectively. An investor sets up a bull spread using 15-months 10-strike and 20-strike put options. Calculate the investors profit at option maturity, given the underlying stock price of $18 at maturity.

Group of answer choices

2.56

2.49

2.34

2.89

Cannot be determined based on the given information