Read the following passage and answer the questions using NO MORE THAN SEVEN WORDS

Read the following passage and answer the questions using NO MORE THAN SEVEN WORDS. Visitors to the USA should learn about the reasons why they should tip the server and how much they should pay for it. Almost every profession in America (including restaurants, hairdressers, taxi drivers, hotel porters, parking valets and bartenders) does not add a service charge to the bill. Therefore, it is expected that the customer will leave a tip for the server. Depending on how good the service is, the customer gives different amounts of tipping, from 10% to 20% of the total bill. Common practice is to leave a tip that is equal to 15% of the total bill for acceptable service, and about 20% for superior service. If the service is poor, then you can leave a smaller tip, about 10%. In situations where there is no bill, the tip may range from $1 to $5. 1. Who should be aware of the tip service in America? . Answer 1 Question 7 2. Why should customers tip the server? Answer 2 Question 7. 3. How much should customers tip? Answer 3 Question 7. 4. If the customer is satisfied with the service, how much does he/ she tip? Answer 4 Question 7. 5. In which case does the server get a $3 tip?