A trader buys a call option on a certain stock with a strike price of $55 and a put option on the same stock with a strike price of $50. both options have the same maturity. the call costs $3 and the put costs $4. let’s denote the price of the stock at the maturity by s_t. what are the conditions on s_t under which the trader’s profit at the maturity becomes positive? (*let’s ignore the effect of interest rates between time 0 and time t.)