One of Teddy's jobs at home is to pump gas for his family's sedan and truck. When he fills the truck up with 12 gallons of gas, he notices that it costs him $39.48. a. How much does one gallon of gas cost? Explain how you found your answer. Hint (a): b. How much will it cost him to fill up the sedan if it needs 15 gallons of gas? Show your work. Hint (b): c. When Teddy filled up the tank on his moped, it cost $13.16. How much gas did his moped need? Explain how you know. Hint (c):