Consider the October 2015 IBM call and put options in Problem 3. Ignoring the negligible interest you

Question:

Consider the October 2015 IBM call and put options in Problem 3. Ignoring the negligible interest you might earn on T-Bills over the remaining few days' life of the options, show that there is no arbitrage opportunity using put-call parity for the options with a $140 Specifically:
a. What is your profit/loss if you buy a call and T-Bills, and sell IBM stock and a put option?
b. What is your profit/loss if you buy IBM stock and a put option, and sell a call and T-Bills?
c. Explain why your answers to (a) and (b) are not both zero.
d. Do the same calculation for the October options with a of $150. What do you find? How can you explain this?
Strike Price
In finance, the strike price of an option is the fixed price at which the owner of the option can buy, or sell, the underlying security or commodity.