8.2 The following questions refer to the FYI box entitled \"Key Provisions of the GATT.\" a. If the United States applies a tariff to a particular product (say, steel) imported from one country, what is the implication for its steel tariffs applied to all other countries according to the 'mostfavored-nation' (MFN) principle? b. Is article XXIV an exception to most-favorednation treatment? Explain why or why not. c. Under the GATT articles, instead of a tariff, can a country impose a quota (quantitative restriction) on the number of goods imported? What has been one exception to this rule in practice