Problem 1. Consider a 6-month 60-strike European double-barrier call option on one share of a non-dividend-paying stock with a knock-in barrier at 70. If the option is knocked in, a knock-out barrier at 80 becomes effective. The underlying stock is trading at 50 per share. The current prices of several 6-month 60-strike European up-and-out calls are as follows. Barrier Up-and-Out Call Premium 60 70 80 90 Calculate the double-barrier all premium? 0 0.1294 0.7583 1.6616