You are asked to send out an important letter to your business associates in Japan, and it must be sent within the next 90 minutes. You know it will take you about 30 minutes to gather all the information you will need to include in the letter. This will leave you one hour for prewriting, drafting, and revising. Because this letter is critical and will influence all future business with your Japanese associates, you know that you will use the entire hour to write the letter. Approximately how much time should you spend revising your message once you have gathered the information you need, planned, and written your message