One minute before the ten hours were up$,$ Walter yelled out "I revoke!" Barbara completed the hula hooping anyway and asked for her car for $$1,000.$ Walter refused saying that the offer was revoked. Sam was very angry and sued Walter for not having a car available that was under two years old so that he could get a good deal and a $$500$ rebate. Additionally, Barbara sued Walter, and Walter sued Zack and Cara. What is the likely result in the lawsuit brought by Walter against Zack?

Walter will win because Zack properly made an offer that Walter accepted.

Zack will win because he was merely expressing possible interest.

Zack will win because Walter did not properly accept.

Zack will win because under a subjective standard, he was joking.

Zack will win because under an objective standard, it appears he was joking.