You are using the binomial tree model (drawn and labelled below) to price a 6-month European option on a stock that is currently trading at $20. The risk-free interest rate is 2% p.a.c.c. The option values at nodes D and E are 2.25 and 0, respectively; the stock price at node B is $25.

A): Is this a call or a put? (1 mark

B): Calculate the remaining stock prices and option values that correspond to every node on the tree. Complete working process must be shown for marks. (10 marks

C): If the option is instead on a futures contract, identify the adjustment you need to make in part (b). (1 mark)