IBM is trading at $80 per share today. Under a binomial setting, its price can either go up to $100 in good economy or go down to $60 per share in bad economy next year. For simplicity, let's assume the interest rate for T-Bill is zero. Consider the IBM 90 call option. uestion 2 (1 point) Which portfolio replicates the payoff of the IBM 90 call option whose strike price is $90? Long 0.5 share of IBM and short $25 T-Bills Long 0.5 share of IBM and long $25 T-Bills Long 0.25 share of IBM and short $15 T-Bills Long 0.25 share of IBM and long $15 T-Bills