katie mows her own yard to save money. her neighbor jonah, however, hires a lawn service to mow his yard. one day, as katie is looking out of the window, jonah's lawn service drives up. to her surprise, they begin to mow her yard, not jonah's yard. katie thinks that is great, exchanges a wave with the workers, and keeps her mouth shut while they mow the yard. later, she gets a bill. she calls the owner of the lawn service and says that she does not have to pay because there was not a contract in place where she agreed to have her yard mowed. the lawn service says that she is liable for the full amount of its contract. discuss whether the lawn service is entitled to any recovery, and why or why not.