Match the words and phrases (1—6) to their definitions (a—f). 1 afier-sales services a) a company or a person that provides a particular type of product 2 guarantee period b) help, advice or free repairs that you get after you buy a product 3 retail 4 wholesale 5 supplier 6 competitor c) a person who tries to be more successful than you d) the selling of goods to businesses, usually in large quantities e) time when the seller repairs or replaces a product free of charge f) the selling of goods to the public, usually through shops