Problem 15.15. Consider an American call option on a stock. The stock price is $70, the time to maturity is eight months, the risk-free rate of interest is 10% per anmum, the exercise price is $65, and the volatility is 32%. A dividend of $1 is expected after three months and again after six months. Show that it can never be optimal to exercise the option on either of the two dividend dates. Use Python code to calculate the price of the option