Consider a European call on a stock when there are ex-dividend dates in four months and seven months. The dividend on each ex-dividend date is expected to be $2.50. The current stock price is $50, the exercise price is $51, the volatility is 20% per annum, the continuously compounded risk- free interest rate is 12% per annum, and the time to expiration is nine months. Calculate the price of the call. Please show how to deal with multiple dividend withen an option. Which is the Ex-Dividend. And show steps.