4. An arbitrageur is considering trading a stock that is listed both on New York Stock Exchange (NYSE) and the London Stock Exchange (LSE). Suppose that the stock price is USD140 in New York and GBP103 in London at a time when the exchange rate is 1.392 USD per GBP. a) Describe an arbitrage trade available to the arbitrageur under the market conditions described above. [4 marks] b) Describe why the arbitrageur cannot take advantage of the arbitrage strategy described at point ii) for an illimited amount of time. [4 marks) [Total: 8 marks)