One night, Bob was leaving his health club, but his car wouldn$$t start. Bob asked Ted, an acquaintance at the health club, for a ride home. Even though it was $50$ miles out of his way, Ted agreed and was glad to do give Bob a ride. When they arrived at Bob$$s house, Bob expressed his gratitude to Ted, saying $$Thanks for the ride. Next time I see you at the club, I$$ll give you $$100.$ The following week, Ted saw Bob at the Club and asked for his $$100.$ Bob told him that he wouldn$$t give Ted $$100.$ Using the elements of a contract, briefly explain whether Bob is legally bound to pay Ted $$100.$

Dan hired Jen to mow his lawn every week for the next $2$ years at $$30$ per cut. Jen agreed, but asked Dan to pay her friend Ethel, instead, because she owed Ethel money. Must the contract between Dan and Jen be in writing? Why or why not? Briefly explain.