2.First Commercial Bank has a total of 100 million US dollars and 10 billion Japanese dollars in its foreign currency positions. Currently, the exchange rate between US dollars and Taiwan dollars is 30 NT/$, with a fluctuation of 10%; the exchange rate between Japanese dollars and Taiwan dollars is 0.35 NT/\, with a fluctuation of 8%; and the correlation coefficient between US dollars and Japanese currency exchange rate is 0.4. Excuse me, what is the fluctuation of the First Bank's foreign currency position