a. Assume an institutional investor writes a March put option on shares of the DBS with an exercise price of 280 and a March expiry date at a price of 10. Calculate the profit and loss at the expiry date for this investor with the prices of 320 and 265. Draw the profit graph of this option (6 marks) b. Assume an investor takes 2 positions: first, a long position in a call option with an exercise price of 55 and a premium of 10; second, a long position in a put option with the exercise price of 55 and a premium of 9. What is the name of this combination strategy? When do investors make profit from this strategy? Show the profit diagrams for both the positions and also for the combination strategy. Calculate the breakeven points. (8 marks) c. Determine the lower bound of the price (minimum price) for a six month call when the share price is 115, the put's exercise price is 100, and the interest rate for the six month period is 6.5 per cent. (3 marks) d. Draw a profit and loss diagram that shows an investment in two long puts, given an exercise price of 40 for the puts and a price for a put option of 6. (3 marks)