Portfolio analysis

4. A one-year long forward contract on a non-dividend-paying stock is entered into when the stock price is $50 and the risk-free rate of interest is 4% per annum with discrete compounding. a) What are the forward price and the initial value of the forward contract? b) Nine months later, the price of the stock is $45 and the risk-free interest rate is still 4%. What are the forward price and the value of the forward contract