Suppose the continuously compounded, risk-free interest rate is 3.75%, an investor creates a bull spread on a stock by purchasing a two-month European call option with a strike price of $100 for $7.57 and selling a two-month European call option with a strike price of $110 for $4.75. Find the profit to the investor if at expiry the stock is worth a (a) $98, (b) $107, (c) $115. Suppose the continuously compounded, risk-free interest rate is 4.25%, an investor creates a bear spread on a stock by purchasing a three- month European put option with a strike price of $425 for $15.75 and selling a three-month European put option with a strike price of $400 for $10.25. Find the profit to the investor if at expiry the stock is worth (a) $375, (b) $410, (c) $450