Rewrite the following sentences from the you-view point. (1) We have received your letter of May 16 (2) We have been quite tolerant of your past-due account and must now demand payment. (3) We have shipped the Dove desk set you ordered on May 3. (4) Our rich experience in the publishing business has enable us to provide the best service possible. (5) We can sell at discount prices, but we cannot permit returns of merchandise.