Problem 4: Performance Obligations (3 points each, 6 points total) Hans Cars & Trucks sells various types of used vehicles with a one-year warranty that covers any defects. When customers make a purchase, they also receive a coupon for 10 free engine oil changes and an option to change all of the tires for $50 after 30,000 miles. Typically, customers pay $25 for an oil change and $250 for a new set of tires. Required: (a) Given the information above, how many performance obligations exist in the contract to purchase a vehicle