4. The share price of A stock is $50 and the risk-free interest rate is 8% per annum. An investor has sold a six-month forward with the underlying asset at the share price of A shares. There is no profit opportunity.

(1) Obtain the value of the forward price and the forward contract at the time of the contract (now).

(2) Three months have passed. The stock of A is now traded at $48. I would like to sell a forward contract with a three-month maturity of the underlying asset at the share price of A. Calculate the forward price and the value at this point in time of (1)'s forward contract sold three months ago.