Hawley owned a Buick car and occasionally had work done on it at the Hoff Repair Garage. One day Hawley drove up with a flat tire, parked his car beside the garage, and called to Hoff that he had a flat tire and would be back in an hour. Hoff fixed the tire. Hawley refused to pay, saying that he had intended to do the job himself. Hawley pays nothing at all because Hoff is an officious intermeddler.

a. Was there a contract? Explain.
b. Suppose Hoff also adjusted the carburetor and straightened a fender. Could he recover for this? Explain