P$.$J$.$ Chase Stanley Bank holds $$83$ million in foreign exchange assets and $$75$ million in foreign exchange liabilities. P$.$J$.$ Chase Stanley also conducted foreign currency trading activity in which it bought $$173$ million in foreign exchange contracts and sold $$146$ million foreign exchange contractsa. What is P$.$J$.$ Chase Stanley's net foreign assets?b$.$ What is P$.$J$.$ Chase Stanley's net foreign exchange bought?c$.$ What is P$.$J$.$ Chase Stanley's net foreign exposure?$($For all requirements, enter your answers in millions.$)$