a certain stock costs 50 today and will pay annual dividends of 4, 5, 6, and 7 for the next 4 years. an investor wishes to purchase a 4-year prepaid forward contract for this stock. the first dividend of 4 will be paid one year from today and the last dividend of 7 will be paid just prior to delivery of the stock. assume an annual effective interest rate of 10%. calculate the price of the prepaid forward contract.