Citibank holds $23 million in foreign exchange assets and $18 million in foreign exchange liabilities. Citibank also conducted foreign currency trading activity in which it bought $5 million in foreign exchange contracts and sold $12 million in foreign exchange contracts. a. What is Citibank's net foreign assets? (Enter your answer in millions.) b. What is Citibank's net foreign exchange bought? (Enter your answer in millions. Negative amount should be indicated by a minus sign.) c. What is Citibank's net foreign exposure? (Enter your answer in millions. Negative amount should be indicated by a minus sign.) million a. Net foreign assets b. Net foreign exchange bought c. Net foreign exposure million million