Use a binomial to value an American call on copper finance problem.

Question 4: The spot-price for copper is 0.6$ per pound. Suppose that the futures prices (dollars per pound) are as follows: The volatility of the price of copper is 40% per annum and the risk-free rate is 6% per annum. Use a binomial tree to value an American call on copper with an exercise price of 0.6$ and a time-to-maturity of 1 year. (Divide the life of the option into four 3- Months periods for the purpose of constructing the tree)